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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
If you prioritize higher refresh rates and lighter weight for better portability, consider the Lenovo Slim Pro 9i; it also has a higher resolution in a 16:10 aspect ratio, which is favorable for productivity tasks. Conversely, the ASUS ZenBook Pro Duo 15 boasts a more robust performance for 3D, machine learning, and engineering tasks with its higher-end GPU and processor, along with better contrast in its OLED display. Both offer touchscreens, backlit keyboards, facial recognition, and are at a similar price point, but the ZenBook provides stronger performance for intensive tasks with a slight tradeoff in weight and refresh rate. 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 Pro Duo 15
- Excellent for engineering and design
- Best in class speakers
Advantages of the Lenovo Slim Pro 9i
- Best in class overall display quality
- Very good overall build quality
- Very good keyboard
Key differences
Screen Quality
8.3
9.6
15.6in
SIZE
14.5in
3840 x 2160
RESOLUTION
3072 x 1920
OLED
DISPLAY TECHNOLOGY
Mini LED
60Hz
REFRESH RATE
165Hz
332.0 nits
BRIGHTNESS
618.0 nits
The ASUS Zenbook Pro Duo 15 has a better screen than the Lenovo Slim Pro 9i for content creation, while the Lenovo Slim Pro 9i has a better screen for general use, gaming and AI, and engineering and design.
The Lenovo Slim Pro 9i excels in screen quality for general use and engineering applications due to its superior resolution, brightness, and expansive color gamuts, ensuring crisp, vibrant visuals crucial for these tasks. The ASUS ZenBook Pro Duo 15, while offering a high-quality display with good brightness and resolution, falls slightly behind the Lenovo in color reproduction, which is essential for precision in engineering and design work. For gaming and 3D applications, however, both laptops have screens that aren't optimal, lacking the high refresh rates needed for smoother motion and responsive gameplay.
Portability
Good
Good
15.6in
SIZE
14.5in
5.1 lbs
WEIGHT
3.7 lbs
0.8in
THICKNESS
0.8in
The Lenovo Slim Pro 9i and ASUS ZenBook Pro Duo 15 both have good portability, though the Lenovo Slim Pro 9i has somewhat better portability.
The most portable laptops are small, thin, and light.
Cost
$2,000
$1,600
$500
$1,000
$1,500
$2,000
$2,500
$3,000
The ASUS ZenBook Pro Duo 15 has a price of $2,000 and the Lenovo Slim Pro 9i costs $1,600.
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Key similarities
General Use
8.5
8.5
3840 x 2160
RESOLUTION
3072 x 1920
OLED
DISPLAY TECHNOLOGY
Mini LED
332.0 nits
DISPLAY BRIGHTNESS
618.0 nits
7.0 Hours
BATTERY LIFE
6.0 Hours
7.5/10
KEYBOARD QUALITY SCORE
8.0/10
7.1/10
PORTABILITY SCORE
7.6/10
The ASUS ZenBook Pro Duo 15 and Lenovo Slim Pro 9i are both very good for general use.
The ASUS ZenBook Pro Duo 15 delivers exceptional screen quality with its high-resolution OLED display and is built for performance with a powerful CPU and abundant RAM, but its heavier weight limits portability and battery life is less ideal for long use without charging.
Gaming and AI
7.8
7.6
7.8/10
OVERALL GPU SCORE
6.9/10
3840 x 2160
RESOLUTION
3072 x 1920
60Hz
REFRESH RATE
165Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
7.7/10
FAN NOISE SCORE
8.0/10
The ASUS ZenBook Pro Duo 15 and Lenovo Slim Pro 9i are both good for gaming and AI.
The ASUS ZenBook Pro Duo 15 offers superior gaming and 3D performance primarily due to its higher-tier Nvidia RTX 3070 Ti graphics card compared to the Lenovo Slim Pro 9i's Nvidia RTX 4050, but at the cost of a lower screen refresh rate. While the Lenovo provides a higher refresh rate which is advantageous for smoother visuals and gameplay, its overall performance may be less powerful due to the GPU difference.
Engineering and Design
9.0
8.9
9.2/10
OVERALL CPU SCORE
9.0/10
7.8/10
OVERALL GPU SCORE
6.9/10
32.0 GB
RAM
32.0 GB
Although they have very similar scores, PerfectRec considers ASUS ZenBook Pro Duo 15 to be excellent for engineering and design, while the Lenovo Slim Pro 9i is very good.
PerfectRec’s Engineering and Design Score takes into account the many different features of the laptop that make it more or less suitable for graphic design and 3D rendering work.
Content Creation
8.7
8.5
9.2/10
OVERALL CPU SCORE
9.0/10
3840 x 2160
RESOLUTION
3072 x 1920
32.0 GB
RAM
32.0 GB
OLED
DISPLAY TECHNOLOGY
Mini LED
The ASUS ZenBook Pro Duo 15 and Lenovo Slim Pro 9i are both very good for content creation.
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
8.3
8.3
9.2/10
OVERALL CPU SCORE
9.0/10
32.0 GB
RAM
32.0 GB
3840 x 2160
RESOLUTION
3072 x 1920
7.5/10
KEYBOARD QUALITY SCORE
8.0/10
The ASUS ZenBook Pro Duo 15 and Lenovo Slim Pro 9i are both very good for software development.
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.
Battery
7.0 Hours
6.0 Hours
The ASUS Zenbook Pro Duo 15 has 7 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.
Build Quality
7.6
8.0
Although they have very similar scores, PerfectRec considers Lenovo Slim Pro 9i to have very good build quality, while the ASUS ZenBook Pro Duo 15 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 Pro Duo 15 and the Lenovo Slim Pro 9i compare to other laptops
Spec Comparison
 |  | |
| ASUS ZenBook Pro Duo 15 | Lenovo Slim Pro 9i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$2,000 | $1,600 | ||
Release Date | |||
Release Date | February 1, 2023 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 14.2'' x 9.8'' x 0.85'' | 12.9'' x 9.6'' x 0.85'' | |
Weight | |||
Weight | 5.16 lbs | 3.7 lbs | |
Width | |||
Width | 14.17" | 12.9" | |
Depth | |||
Depth | 9.81" | 9.64" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i9-12900H | Intel i7-13705H | |
RAM | |||
RAM | 32 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 0 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 7 Hours | 6 Hours | |
Battery Capacity | |||
Battery Capacity | 92 Wh | 75 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 14.5" | |
Display Technology | |||
Display Technology | OLED | Mini LED | |
Resolution | |||
Resolution | 3840 x 2160 | 3072 x 1920 | |
Refresh Rate | |||
Refresh Rate | 60Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 332 nits | 618 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.6/10 | 8/10 | |
Portability Score | |||
Portability Score | 7.1/10 | 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 | 7.8/10 | 8/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 7.5/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 9.6/10 | 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 Pro Duo 15
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Dig into reviews and images
PCWorld
Jared Newman | August 2021
"Benchmarks aside, the Asus ZenBook Pro Duo is hard to compare with other PCs. Its closest competition may be a multi-monitor desktop, or a laptop with an attached travel monitor. The Pro Duo is more portable and versatile than either of those options, especially with the software tools Asus has thrown on top. For a certain niche of artists, media creators, and gamers, all that might add up to something special, even if it’s unattainable for the rest of us."
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 Pro Duo 15 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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