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Updated January 10, 2024·
If you prioritize portability and longer battery life for general use, the Lenovo Legion Slim 7 offers a more manageable weight and longer usage between charges at a lower price. The MSI Stealth GS66, despite having a shorter battery life and being slightly heavier, delivers better performance for 3D rendering, machine learning, and engineering tasks, and comes with a higher refresh rate display, which is advantageous for gaming and fast-motion visuals, though this is reflected in a higher price tag. Both have sufficient power for common tasks and gaming, though MSI’s advantage is pronounced in performance-intensive scenarios. 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 Legion Slim 7 15.6"
- Good battery life
Advantages of the MSI Stealth GS66
- Very good for engineering and design
- Very good overall display quality
- Very good overall build quality
Key differences
Screen Quality
7.7
8.1
15.6in
SIZE
15.6in
1920 x 1080
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
360Hz
350.0 nits
BRIGHTNESS
280.0 nits
The MSI Stealth GS66 has a better screen than the Lenovo Legion Slim 7 for gaming and AI.
When choosing a laptop for general use, the Lenovo Legion Slim 7 and the MSI Stealth GS66 both offer displays with good resolution and brightness, ensuring a clear and vibrant viewing experience for everyday tasks like browsing and video streaming. For engineering and design professionals, both laptops provide a wide color gamut, ensuring that the colors rendered on the screen are accurate and consistent, which is critical for tasks that require precise color work. However, for gaming and 3D applications, neither laptop excels due to their lower refresh rates, which can make fast-paced action appear less smooth, impacting the overall visual fluidity and responsiveness crucial for an immersive gaming experience.
Battery
9.0 Hours
5.5 Hours
The Lenovo Legion Slim 7 has 9 hours of battery life. The MSI Stealth GS66 has 5.5 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.
Cost
$1,200
$1,799
$500
$1,000
$1,500
$2,000
$2,500
$3,000
The Lenovo Legion Slim 7 15.6" has a price of $1,200 and the MSI Stealth GS66 costs $1,799.
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Key similarities
General Use
7.7
7.7
1920 x 1080
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
350.0 nits
DISPLAY BRIGHTNESS
280.0 nits
9.0 Hours
BATTERY LIFE
5.5 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
7.6/10
PORTABILITY SCORE
7.5/10
The Lenovo Legion Slim 7 15.6" and MSI Stealth GS66 are both good for general use.
The Lenovo Legion Slim 7 is great for general use thanks to its strong CPU and ample RAM, a high-quality IPS screen with good color coverage, in a lightweight design that enhances portability. The MSI Stealth GS66 also excels in general use due to its powerful processor, sufficient memory, a quality display with a higher refresh rate, and a larger battery capacity, albeit with a somewhat heavier build that may slightly reduce ease of carrying.
Gaming and AI
7.4
7.8
7.1/10
OVERALL GPU SCORE
7.8/10
1920 x 1080
RESOLUTION
1920 x 1080
165Hz
REFRESH RATE
360Hz
Yes
SUPPORTS DLSS
Yes
Yes
MUX SWITCH / ADVANCED OPTIMUS
No
7.5/10
FAN NOISE SCORE
7.5/10
The MSI Stealth GS66 and Lenovo Legion Slim 7 15.6" are both good for gaming and AI.
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
7.8
8.2
7.4/10
OVERALL CPU SCORE
9.1/10
7.1/10
OVERALL GPU SCORE
7.8/10
16.0 GB
RAM
16.0 GB
Although they have very similar scores, PerfectRec considers MSI Stealth GS66 to be very good for engineering and design, while the Lenovo Legion Slim 7 15.6" is good.
The MSI Stealth GS66 is favored for engineering and design use due to a more powerful Intel i7-12700H CPU and Nvidia RTX 3070 Ti GPU, compared to the Lenovo Legion Slim 7's AMD Ryzen 7 5800H and RTX 3060. While the Lenovo offers slightly longer battery life and lower operating noise, its lower screen brightness could be a drawback for design work, which the MSI compensates with a superior GPU, albeit at the cost of heavier weight and increased noise.
Content Creation
7.7
7.7
7.4/10
OVERALL CPU SCORE
9.1/10
1920 x 1080
RESOLUTION
1920 x 1080
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The MSI Stealth GS66 and Lenovo Legion Slim 7 15.6" are both 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
7.5
7.5
7.4/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
1920 x 1080
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 7 15.6" and MSI Stealth GS66 are both 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.
Portability
Good
Good
15.6in
SIZE
15.6in
4.1 lbs
WEIGHT
4.6 lbs
0.6in
THICKNESS
0.7in
The Lenovo Legion Slim 7 15.6" and MSI Stealth GS66 both have good portability.
The most portable laptops are small, thin, and light.
Build Quality
7.6
8.0
Although they have very similar scores, PerfectRec considers MSI Stealth GS66 to have very good build quality, while the Lenovo Legion Slim 7 15.6" 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 Lenovo Legion Slim 7 15.6" and the MSI Stealth GS66 compare to other laptops
Spec Comparison
 |  | |
| Lenovo Legion Slim 7 15.6" | MSI Stealth GS66 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,200 | $1,799 | ||
Release Date | |||
Release Date | May 1, 2022 | April 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 14'' x 9.9'' x 0.69'' | 14.2'' x 9.7'' x 0.71'' | |
Weight | |||
Weight | 4.19 lbs | 4.63 lbs | |
Width | |||
Width | 14.02" | 14.17" | |
Depth | |||
Depth | 9.92" | 9.65" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | AMD Ryzen 7 5800H | Intel i7-12700H | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 1 | 2 | |
Storage | |||
Storage | 512 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 9 Hours | 5.5 Hours | |
Battery Capacity | |||
Battery Capacity | 71 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 15.6" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 1920 x 1080 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 360Hz | |
Display Brightness | |||
Display Brightness | 350 nits | 280 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.6/10 | 8/10 | |
Portability Score | |||
Portability Score | 7.6/10 | 7.5/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | Yes | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 7.5/10 | 7.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8.5/10 | 8.5/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8/10 | 8/10 | |
Webcam | |||
Webcam | 720p | 720p | |
Fingerprint Reader | |||
Fingerprint Reader | Yes | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | Yes | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 2 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 3 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 2 | 4 | |
Thunderbolt Version | |||
Thunderbolt Version | N/A | 4 | |
Shopping
Lenovo Legion Slim 7 15.6"
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Dig into reviews and images
NotebookCheck
Benjamin Herzig | November 2022
"The Lenovo Legion Slim 7 is a slim Legion notebook that is just as excellent with Nvidia & Intel. However, the Legion Slim 7i slightly sullied by lacklustre battery life. You get a slim aluminium chassis, great input devices, decent port selection, fast high-quality WQXGA display and great performance. Supporting Thunderbolt 4 is one advantage of the Intel/Nvidia model tested in this review. Moreover, this variant has slightly higher CPU performance as well as better GPU performance in certain applications (e.g. CUDA-based apps). The Lenovo Legion S7i is thin, premium and performant – but less efficient than its AMD counterpart."
MSI Stealth GS66
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Dig into reviews and images
NotebookCheck
Florian Glaser | February 2022
"The MSI Stealth GS66 is powerful enough for QHD. The Core i7-12700H and the GeForce RTX 3070 Ti found in the 12UGS model that we tested run all modern games smoothly in the native QHD resolution. The 15-inch display is very fast with its 240 Hz refresh rate, and it also offers a great color space (almost 100% DCI-P3) on top of that, which should please gamers as well as content creators, although we would have still wished for a higher brightness. Case, input devices, and connectivity (Thunderbolt 4) are at a good level. However, among other things, the GS66 loses points due to the high temperature development in 3D mode and its poor webcam."
Get a great deal on the Lenovo Legion Slim 7 15.6" or the MSI Stealth GS66
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 MSI
MSI, also known as Micro-Star International, is a Taiwanese technology corporation. MSI is known for their wide range of gaming devices. Their series include the entry-level Cyborg/Thin and Sword/Katana series, the mid-range Bravo/Delta and Crosshair/Pulse series, and their high-end Vector, Raider, Stealth, and Titan GT series. At every performance level, MSI offers a variety of devices with varying balances between performance, battery life, weight, and price, making them a solid option to consider at every price point.
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