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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
If you need a powerful laptop for intense tasks like 3D rendering, machine learning, or gaming and don't mind a heavier device with a shorter battery life and higher cost, the Razer Blade 18 is equipped for high performance with a larger screen. On the other hand, the Lenovo Slim Pro 9i offers a balance of performance, better battery life, and portability at a lower price, suitable for general use and some engineering applications, with a high-quality display that's smaller but touch-enabled. A Razer may excel in gaming aesthetics, whereas the Lenovo strikes a more professional appearance. 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 Lenovo Slim Pro 9i
- Best in class overall display quality
- Good portability
- Good battery life
Advantages of the Razer Blade 18
- Excellent for engineering and design
- Very good for gaming and AI
- Best in class speakers
- Excellent keyboard
Key differences
Gaming and AI
7.6
8.9
6.9/10
OVERALL GPU SCORE
8.9/10
3072 x 1920
RESOLUTION
2560 x 1600
165Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
8.0/10
FAN NOISE SCORE
7.2/10
The Razer Blade 18 is very good for gaming and AI, while the Lenovo Slim Pro 9i is good.
The Razer Blade 18 offers superior gaming and 3D performance thanks to its more powerful Nvidia RTX 4070 GPU and higher screen refresh rate of 240 compared to the Lenovo Slim Pro 9i which has an Nvidia RTX 4050 GPU and a refresh rate of 165. While both devices are well-suited for demanding tasks, the better GPU and faster refresh rate in the Razer Blade 18 make it excellent for these purposes, though it may come at a higher price and less portability due to its larger size.
Screen Quality
9.6
8.9
14.5in
SIZE
18.0in
3072 x 1920
RESOLUTION
2560 x 1600
Mini LED
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
618.0 nits
BRIGHTNESS
524.0 nits
The Lenovo Slim Pro 9i has a better screen than the Razer Blade 18 for general use, gaming and AI, and engineering and design.
For general use, the Lenovo Slim Pro 9i's superior resolution and brightness enhance the clarity and visibility in various lighting conditions, making it ideal for everyday tasks. In engineering and design, the Lenovo's wider color gamut support is crucial for accurate color reproduction, which is essential for professionals in those fields. However, the Razer Blade 18, with its lower refresh rate, falls short for gaming and 3D work, where smoother motion and faster on-screen updates are critical for an optimal experience.
Battery
6.0 Hours
4.0 Hours
The Lenovo Slim Pro 9i has 6 hours of battery life. The Razer Blade 18 has 4 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
Good
Fair
14.5in
SIZE
18.0in
3.7 lbs
WEIGHT
6.6 lbs
0.8in
THICKNESS
0.8in
The Lenovo Slim Pro 9i has good portability, while the Razer Blade 18 has only fair portability.
The most portable laptops are small, thin, and light.
Cost
$1,600
$10
$0
$500
$1,000
$1,500
$2,000
$2,500
The Lenovo Slim Pro 9i has a price of $1,600 and the Razer Blade 18 costs $10.
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Key similarities
General Use
8.5
8.5
3072 x 1920
RESOLUTION
2560 x 1600
Mini LED
DISPLAY TECHNOLOGY
IPS
618.0 nits
DISPLAY BRIGHTNESS
524.0 nits
6.0 Hours
BATTERY LIFE
4.0 Hours
8.0/10
KEYBOARD QUALITY SCORE
9.0/10
7.6/10
PORTABILITY SCORE
6.1/10
The Razer Blade 18 and Lenovo Slim Pro 9i are both very good for general use.
The Lenovo Slim Pro 9i is well-regarded for general use due to its balance of a powerful CPU and ample RAM, high-quality Mini LED screen for vivid visuals, and good portability backed by a reasonable battery life. On the other hand, the Razer Blade 18 offers top-tier performance with an even more robust CPU and excellent screen quality, though it's less portable and has shorter battery life, making it more suited for stationary use or short trips. Both laptops have ample storage and feature high-quality keyboards and speakers, but trade-offs between portability and supreme performance set them apart.
Engineering and Design
8.9
9.3
9.0/10
OVERALL CPU SCORE
9.9/10
6.9/10
OVERALL GPU SCORE
8.9/10
32.0 GB
RAM
32.0 GB
Although they have very similar scores, PerfectRec considers Razer Blade 18 to be excellent for engineering and design, while the Lenovo Slim Pro 9i is very good.
The Lenovo Slim Pro 9i excels in engineering and design due to its high-powered Intel i7 CPU, substantial 32GB of RAM, capable Nvidia RTX 4050 GPU, and its Mini LED screen offers exceptional color coverage and brightness, which is crucial for precision tasks. In comparison, the Razer Blade 18 features an even more potent Intel i9 CPU and a higher-tier Nvidia RTX 4070 GPU, catering to the most demanding engineering software and design work, but trades off increased weight and reduced battery life for its larger screen and graphics capability.
Content Creation
8.5
8.6
9.0/10
OVERALL CPU SCORE
9.9/10
3072 x 1920
RESOLUTION
2560 x 1600
32.0 GB
RAM
32.0 GB
Mini LED
DISPLAY TECHNOLOGY
IPS
The Razer Blade 18 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
8.5
9.0/10
OVERALL CPU SCORE
9.9/10
32.0 GB
RAM
32.0 GB
3072 x 1920
RESOLUTION
2560 x 1600
8.0/10
KEYBOARD QUALITY SCORE
9.0/10
The Razer Blade 18 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.
Build Quality
8.0
8.5
The Razer Blade 18 and Lenovo Slim Pro 9i both have very 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 Lenovo Slim Pro 9i and the Razer Blade 18 compare to other laptops
Spec Comparison
 |  | |
| Lenovo Slim Pro 9i | Razer Blade 18 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,600 | $10 | ||
Release Date | |||
Release Date | February 1, 2023 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 12.9'' x 9.6'' x 0.85'' | 15.7'' x 10.8'' x 0.86'' | |
Weight | |||
Weight | 3.7 lbs | 6.68 lbs | |
Width | |||
Width | 12.9" | 15.7" | |
Depth | |||
Depth | 9.64" | 10.8" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-13705H | Intel i9-13950HX | |
RAM | |||
RAM | 32 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 2 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 4 Hours | |
Battery Capacity | |||
Battery Capacity | 75 Wh | 91.7 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 14.5" | 18" | |
Display Technology | |||
Display Technology | Mini LED | IPS | |
Resolution | |||
Resolution | 3072 x 1920 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 618 nits | 524 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8/10 | 8.5/10 | |
Portability Score | |||
Portability Score | 7.7/10 | 6.2/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | No | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 8/10 | 7.3/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8/10 | 9/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8/10 | 9.5/10 | |
Webcam | |||
Webcam | 1080p | 1440p | |
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 | 2 | 3 | |
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
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."
Razer Blade 18
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Dig into reviews and images
PCMag
Matthew Buzzi | March 2023
"Razer made a powerful laptop in the Blade 18, showing off a beautiful and fast display and the same high-quality build we’ve come to expect from this product line. It’s also quite expensive, which is hardly a surprise, but bears repeating even in this price range. It’s pricier than the Scar 18 despite an inferior GPU and half the storage, so you really have to want the Blade 18’s design to justify the cost."
Get a great deal on the Lenovo Slim Pro 9i or the Razer Blade 18
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.
About Razer
Razer is an American-Singaporean technology company. Razer is best known for their Blade series laptops, well known for their strong performance and sleek design. Although Razer charges a premium price tag for their laptops, buyers can expect a stealthy laptop with clean fit and finish and strong performance. All of their models offer great portability and build quality compared to other gaming laptops.
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This information was produced and vetted by the PerfectRec laptops team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest laptop information and makes it digestible for you.
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