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Updated January 10, 2024·
Considering your needs, if battery life and portability are highly important to you, with a preference for a 2-in-1 form factor and a sharp 4K display, the ASUS Zenbook Flip S13 may serve you well. However, if you require more power for tasks like 3D rendering, machine learning, or engineering simulations, and don't mind a heavier device with less battery life, the Lenovo Slim Pro 9i with its superior processor and dedicated graphics might be the better option. Keep in mind the Lenovo has almost double the RAM, which is beneficial for multitasking and complex tasks, but it is heavier and has a shorter battery life compared to the ASUS. Both laptops are in a similar price range, with the ASUS being slightly more expensive. 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 Flip S13
- Excellent portability
- Very good battery life
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
7.7
8.5
3840 x 2160
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
372.0 nits
DISPLAY BRIGHTNESS
618.0 nits
10.5 Hours
BATTERY LIFE
6.0 Hours
7.0/10
KEYBOARD QUALITY SCORE
8.0/10
9.3/10
PORTABILITY SCORE
7.6/10
The Lenovo Slim Pro 9i is very good for general use, while the ASUS Zenbook Flip S13 is good.
The ASUS Zenbook Flip S13, with its 2-in-1 flexibility, excels in portability and battery life for general usage, while the Lenovo Slim Pro 9i provides higher performance with more RAM and a better CPU, along with a superior keyboard and speaker quality, but is heavier and has a shorter battery life.
Gaming and AI
6.3
7.6
3.7/10
OVERALL GPU SCORE
6.9/10
3840 x 2160
RESOLUTION
3072 x 1920
60Hz
REFRESH RATE
165Hz
No
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.5/10
FAN NOISE SCORE
8.0/10
The Lenovo Slim Pro 9i is good for gaming and AI, while the ASUS Zenbook Flip S13 is only fair.
The Lenovo Slim Pro 9i offers better gaming and 3D performance mainly due to its dedicated Nvidia RTX 4050 graphics card combined with a higher screen refresh rate, which the ASUS Zenbook Flip S13 lacks with its integrated Intel Iris Xe graphics and lower screen refresh rate. Additionally, the Lenovo has a more powerful CPU and superior screen quality, enhancing the overall gaming and 3D experience in comparison to the ASUS model.
Engineering and Design
7.4
8.9
5.5/10
OVERALL CPU SCORE
9.0/10
3.7/10
OVERALL GPU SCORE
6.9/10
16.0 GB
RAM
32.0 GB
The Lenovo Slim Pro 9i is very good for engineering and design, while the ASUS Zenbook Flip S13 is good.
The Lenovo Slim Pro 9i excels in engineering and design tasks owing to its higher RAM, more powerful CPU, and dedicated Nvidia RTX GPU, which significantly enhance processing power and graphics performance compared to the ASUS Zenbook Flip S13's competent but less robust Intel Iris Xe graphics and lower RAM. Additionally, the Slim Pro 9i's Mini LED screen offers a higher brightness and refresh rate, improving visual detail and smoothness, while the Zenbook's IPS display, though high in resolution and color accuracy, is not as advanced in terms of lighting technology and refresh capabilities.
Content Creation
7.8
8.5
5.5/10
OVERALL CPU SCORE
9.0/10
3840 x 2160
RESOLUTION
3072 x 1920
16.0 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 Flip S13 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
7.6
8.3
5.5/10
OVERALL CPU SCORE
9.0/10
16.0 GB
RAM
32.0 GB
3840 x 2160
RESOLUTION
3072 x 1920
7.0/10
KEYBOARD QUALITY SCORE
8.0/10
The Lenovo Slim Pro 9i is very good for software development, while the ASUS Zenbook Flip S13 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
7.9
9.6
13.3in
SIZE
14.5in
3840 x 2160
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
60Hz
REFRESH RATE
165Hz
372.0 nits
BRIGHTNESS
618.0 nits
The Lenovo Slim Pro 9i has a better screen than the ASUS Zenbook Flip S13 for general use, gaming and AI, engineering and design, content creation, and software development.
For general use, the Lenovo Slim Pro 9i provides an exceptional viewing experience due to its high resolution, vibrant colors, and bright display, making everyday tasks and media consumption a pleasure. When it comes to engineering and design, its wide color gamuts ensure that professionals can see accurate colors and fine details, essential for precision work. However, for gaming and 3D applications, both laptops fall short due to lower refresh rates, which means less smooth visuals and potentially less immersive gameplay compared to laptops designed with higher refresh rates specifically for gaming.
Battery
10.5 Hours
6.0 Hours
The ASUS Zenbook Flip S13 has 10.5 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
Excellent
Good
13.3in
SIZE
14.5in
2.6 lbs
WEIGHT
3.7 lbs
0.5in
THICKNESS
0.8in
The ASUS Zenbook Flip S13 has excellent portability, while the Lenovo Slim Pro 9i has good portability.
The most portable laptops are small, thin, and light.
Cost
$1,400
$1,500
$500
$1,000
$1,500
$2,000
$2,500
The ASUS Zenbook Flip S13 has a price of $1,400 and the Lenovo Slim Pro 9i costs $1,500.
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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 Flip S13 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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We’re constantly working to improve.
How the ASUS Zenbook Flip S13 and the Lenovo Slim Pro 9i compare to other laptops
Spec Comparison
 |  | |
| ASUS Zenbook Flip S13 | Lenovo Slim Pro 9i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,400 | $1,500 | ||
Release Date | |||
Release Date | August 1, 2021 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 12'' x 8.3'' x 0.51'' | 12.9'' x 9.6'' x 0.85'' | |
Weight | |||
Weight | 2.65 lbs | 3.7 lbs | |
Width | |||
Width | 12.01" | 12.9" | |
Depth | |||
Depth | 8.31" | 9.64" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-1165G7 | Intel i7-13705H | |
RAM | |||
RAM | 16 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 0 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 10.5 Hours | 6 Hours | |
Battery Capacity | |||
Battery Capacity | 67 Wh | 75 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 13.3" | 14.5" | |
Display Technology | |||
Display Technology | IPS | Mini LED | |
Resolution | |||
Resolution | 3840 x 2160 | 3072 x 1920 | |
Refresh Rate | |||
Refresh Rate | 60Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 372 nits | 618 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.8/10 | 8/10 | |
Portability Score | |||
Portability Score | 9.3/10 | 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 | 6.5/10 | 8/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 7/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 7.5/10 | 8/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | Yes | 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 Flip S13
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Dig into reviews and images
Tom's Hardware
Charles Jefferies | January 2023
"The Asus Zenbook S 13 Flip is an ultra-sleek 2-in-1 convertible. A gorgeous OLED screen and lightweight magnesium chassis make this convertible a traveller’s dream. Its SSD isn’t fast, but it won’t hold you back in everyday use. Its battery life also isn’t class leading, but it’s hardly off the pace. Overall, the Zenbook S 13 Flip OLED holds its head high in the premium convertible category and is a smaller alternative to the Spectre x360 13.5 and the Yoga 9i Gen 7."
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 Flip S13 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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