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The PerfectRec laptop team Learn more
Updated January 10, 2024·
The ASUS Zenbook Duo 14 offers a lower price and longer battery life, making it a good fit for general use, especially if you're seeking affordability and portability. However, it has less storage, RAM, and a lower-performing processor and graphics unit compared to the Lenovo Slim Pro 9i. On the other hand, the Lenovo Slim Pro 9i, despite its higher price, comes with significantly greater storage and memory, as well as a more powerful processor and graphics card suitable for 3D rendering, machine learning, and engineering tasks. It also features a higher resolution, brighter, and more color-accurate display, which is ideal for creative professionals. However, its battery life is shorter than the ASUS, and it may be slightly less portable due to its increased performance capabilities. Choose the ASUS for everyday tasks and mobility, or the Lenovo if you need more power for specialized tasks and prefer a better screen at the expense of battery life and a higher cost. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the ASUS Zenbook Duo 14
- Very good portability
Advantages of the Lenovo Slim Pro 9i
- Very good for general use
- Very good for engineering and design
- Good for gaming and AI
- Very good for software development
- Very good for content creation
- Best in class overall display quality
- Very good overall build quality
- Very good speakers
- Very good keyboard
Key differences
General Use
7.1
8.5
1920 x 1080
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
314.0 nits
DISPLAY BRIGHTNESS
618.0 nits
8.5 Hours
BATTERY LIFE
6.0 Hours
6.7/10
KEYBOARD QUALITY SCORE
8.0/10
8.2/10
PORTABILITY SCORE
7.6/10
The Lenovo Slim Pro 9i is very good for general use, while the ASUS Zenbook Duo 14 is good.
The ASUS Zenbook Duo 14, with its dual-screen setup, offers a unique multitasking experience that can be beneficial for productivity but may add weight and reduce battery life, making it less portable than the Lenovo Slim Pro 9i, which balances a high-quality display, lighter design, and longer battery life to provide a very good overall user experience for general purposes. While both offer solid performance through their CPUs and sufficient RAM, the Lenovo has an edge with a more vibrant screen and greater on-the-go convenience.
Gaming and AI
6.1
7.6
3.7/10
OVERALL GPU SCORE
6.9/10
1920 x 1080
RESOLUTION
3072 x 1920
60Hz
REFRESH RATE
165Hz
No
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
7.0/10
FAN NOISE SCORE
8.0/10
The Lenovo Slim Pro 9i is good for gaming and AI, while the ASUS Zenbook Duo 14 is only fair.
PerfectRec’s Gaming and AI Score strongly emphasizes graphics processing capability, while also taking into account other factors that impact suitability for gaming and AI work.
Engineering and Design
6.6
8.9
5.5/10
OVERALL CPU SCORE
9.0/10
3.7/10
OVERALL GPU SCORE
6.9/10
8.0 GB
RAM
32.0 GB
The Lenovo Slim Pro 9i is very good for engineering and design, while the ASUS Zenbook Duo 14 is only fair.
The Lenovo Slim Pro 9i outshines the ASUS Zenbook Duo 14 in engineering and design use primarily due to its superior CPU, a substantial amount of RAM, and a cutting-edge GPU that can handle demanding software, along with a high-quality Mini LED screen that offers a sharper resolution and better color accuracy; whereas the Zenbook Duo 14, while competent, offers lower-tier graphics and processing capabilities and a standard IPS display, which may not cater as well to professionals seeking the highest levels of detail and color representation. Although the Zenbook Duo 14 is slightly more portable and has better operating noise management, these factors may not outweigh the Pro 9i's performance advantages in rigorous engineering applications.
Content Creation
7.3
8.5
5.5/10
OVERALL CPU SCORE
9.0/10
1920 x 1080
RESOLUTION
3072 x 1920
8.0 GB
RAM
32.0 GB
IPS
DISPLAY TECHNOLOGY
Mini LED
The Lenovo Slim Pro 9i is very good for content creation, while the ASUS Zenbook Duo 14 is good.
PerfectRec’s Content Creation Score takes into account the many different features of the laptop that make it more or less suitable for photo editing, video editing and other content creation tasks.
Software Development
7.0
8.3
5.5/10
OVERALL CPU SCORE
9.0/10
8.0 GB
RAM
32.0 GB
1920 x 1080
RESOLUTION
3072 x 1920
6.7/10
KEYBOARD QUALITY SCORE
8.0/10
The Lenovo Slim Pro 9i is very good for software development, while the ASUS Zenbook Duo 14 is good.
PerfectRec’s Software Development Score takes into account the many different features of the laptop that make it more or less suitable for software developers.
Screen Quality
6.8
9.6
14.0in
SIZE
14.5in
1920 x 1080
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
60Hz
REFRESH RATE
165Hz
314.0 nits
BRIGHTNESS
618.0 nits
The Lenovo Slim Pro 9i has a better screen than the ASUS Zenbook Duo 14 for general use, gaming and AI, engineering and design, content creation, and software development.
If you prioritize a vivid display for daily activities and professional design work, you'll appreciate the Lenovo Slim Pro 9i for its exceptional resolution and brightness, ensuring crisp and clear visuals. It also covers a wide range of colors, which is crucial for accuracy in engineering and graphic design tasks. However, if gaming or 3D rendering is your focus, neither laptop is ideal due to their lower refresh rates, which may not provide as smooth of an experience as specialized gaming laptops.
Battery
8.5 Hours
6.0 Hours
The ASUS Zenbook Duo 14 has 8.5 hours of battery life. The Lenovo Slim Pro 9i has 6 hours of battery life.
Battery life estimate is based on a mix of common use patterns. More portable and higher performing laptops tend to have less battery life.
Portability
Very Good
Good
14.0in
SIZE
14.5in
3.6 lbs
WEIGHT
3.7 lbs
0.6in
THICKNESS
0.8in
The ASUS Zenbook Duo 14 has very good portability, while the Lenovo Slim Pro 9i has good portability.
The most portable laptops are small, thin, and light.
Cost
$999
$1,600
$500
$1,000
$1,500
$2,000
$2,500
The ASUS Zenbook Duo 14 has a price of $999 and the Lenovo Slim Pro 9i costs $1,600.
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Key similarities
Build Quality
7.8
8.0
Although they have very similar scores, PerfectRec considers Lenovo Slim Pro 9i to have very good build quality, while the ASUS Zenbook Duo 14 has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
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How the ASUS Zenbook Duo 14 and the Lenovo Slim Pro 9i compare to other laptops
Spec Comparison
 |  | |
| ASUS Zenbook Duo 14 | Lenovo Slim Pro 9i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$999 | $1,600 | ||
Release Date | |||
Release Date | August 1, 2021 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 12.8'' x 8.7'' x 0.67'' | 12.9'' x 9.6'' x 0.85'' | |
Weight | |||
Weight | 3.64 lbs | 3.7 lbs | |
Width | |||
Width | 12.76" | 12.9" | |
Depth | |||
Depth | 8.74" | 9.64" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-1195G7 | Intel i7-13705H | |
RAM | |||
RAM | 8 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 0 | |
Storage | |||
Storage | 512 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 8.5 Hours | 6 Hours | |
Battery Capacity | |||
Battery Capacity | 70 Wh | 75 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 14" | 14.5" | |
Display Technology | |||
Display Technology | IPS | Mini LED | |
Resolution | |||
Resolution | 1920 x 1080 | 3072 x 1920 | |
Refresh Rate | |||
Refresh Rate | 60Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 314 nits | 618 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.8/10 | 8/10 | |
Portability Score | |||
Portability Score | 8.2/10 | 7.7/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | No | No | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 7/10 | 8/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 6.8/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 7/10 | 8/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 1 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 2 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 3 | |
Thunderbolt Version | |||
Thunderbolt Version | 4 | 4 | |
Shopping
ASUS Zenbook Duo 14
See more
Dig into reviews and images
NotebookCheck
Allen Ngo | May 2020
"The Asus ZenBook Duo's second screen is like the Apple Touch Bar, but better. Most would agree that having two screens instead of one can really boost productivity and the ZenBook Duo is no different in this regard. It's tough going back to just one screen after becoming accustomed to spacious dual-screen setups. For a laptop form factor, however, users will have to accept some compromises. Firstly, weight is the most obvious drawback as the system is several hundred grams heavier than a regular ZenBook 14. Additionally, colors on the second screen will not be as vivid as the main display."
Lenovo Slim Pro 9i
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Dig into reviews and images
PCWorld
Matthew S. Smith | August 2023
"The Lenovo Slim Pro 9i is an impressive laptop with a brilliant Mini-LED display, a powerful 100-watt version of Nvidia RTX 4050 graphics, and excellent connectivity. Having run the Cinebench benchmark again, we were impressed with the CPU performance. That makes the Slim Pro 9i is an easy recommendation, especially for those who care about GPU and CPU performance. It’s also a fantastic choice if you frequently view HDR movies and games on your laptop."
Get a great deal on the ASUS Zenbook Duo 14 or the Lenovo Slim Pro 9i
About ASUS
ASUS, a Taiwanese electronics brand, is one of the largest personal computer vendor by market share. The majority of their laptops are targeted towards personal use or gaming. Their most popular product lines include the budget-friendly VivoBook, more premium ZenBook, and their TUF and ROG gaming laptops, the latter of which has a reputation for excellent gaming performance.
About Lenovo
Lenovo is a Chinese technology company, and one of the largest personal computer vendor. They are well known for a variety of technology products, including laptops. Their consumer series include their entry level IdeaPad and LOQ series and mid-to-high-end Yoga and Legion series. On the business-oriented side, their series include their entry-level ThinkBook series and mid-to-high-end ThinkPad series. Lenovo laptops offer strong performance for reasonable prices, and are often on sale.
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