The ASUS ROG Zephyrus G15 offers high performance, suitable for intensive gaming and engineering tasks, with a slightly brighter screen and good heat management. However, it may not be as portable as some other options and its webcam performance is lower. On the other hand, the Lenovo Legion Slim 7 16" is very capable for engineering, 3D rendering, and machine learning tasks, with a newer GPU and a higher refresh rate screen, which makes it great for fast motion clarity, but it has less color coverage for creative work. Both have similar battery lives and are competitively priced; choosing between the two depends on whether portability, webcam quality, and screen refresh rate (Lenovo), or screen brightness and color accuracy (ASUS) are more important for your needs. 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 ROG Zephyrus G15
Very good overall build quality
Best in class speakers
Advantages of the Lenovo Legion Slim 7 16"
Very good for general use
Very good for gaming and AI
Very good for software development
Very good overall display quality
Very good keyboard
Key differences
Gaming and AI
7.5/10
8.2/10
7.4/10
OVERALL GPU SCORE
8.3/10
2560 x 1440
RESOLUTION
2560 x 1600
165Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.5/10
FAN NOISE SCORE
7.5/10
The Lenovo Legion Slim 7 16" is very good for gaming and AI, while the ASUS ROG Zephyrus G15 is good.
The Lenovo Legion Slim 7 16" is very good for gaming and 3D because it has a higher screen refresh rate and a more recent GPU which can better handle the demands of modern games and 3D applications, whereas the ASUS ROG Zephyrus G15, while still good for these tasks, has a less powerful GPU and a lower refresh rate, limiting its performance in comparison. Additionally, the CPU and screen quality for both laptops are suited for gaming, but the Legion Slim 7's advantages in GPU and refresh rate make it stand out for very intensive gaming and 3D work.
Engineering and Design
8.0/10
8.6/10
7.5/10
OVERALL CPU SCORE
9.1/10
7.4/10
OVERALL GPU SCORE
8.3/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 7 16" and ASUS ROG Zephyrus G15 are both very good for engineering and design, though the Lenovo Legion Slim 7 16" is somewhat better.
The ASUS ROG Zephyrus G15 and the Lenovo Legion Slim 7 16" both offer high-end CPUs and ample RAM, which are crucial for running complex engineering and design software smoothly, and they come with powerful GPUs suitable for demanding graphical tasks; both have high-quality displays with resolutions that exceed standard Full HD, which is key for detailed visual work. While the ASUS leans towards a better-balanced gaming experience with its slightly better gaming graphics card and higher refresh rate, making it slightly nosier, the Lenovo offers a more portable package with its slightly lighter build and better battery life, plus an improved keyboard and speaker quality, making it a more comfortable choice for long work sessions.
Software Development
7.4/10
8.0/10
7.5/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
2560 x 1600
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 7 16" is very good for software development, while the ASUS ROG Zephyrus G15 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
7.9/10
8.7/10
15.6in
SIZE
16.0in
2560 x 1440
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
309.0 nits
BRIGHTNESS
502.0 nits
The Lenovo Legion Slim 7 has a better screen than the ASUS ROG Zephyrus G15 for general use, gaming and AI, engineering and design, content creation, and software development.
When considering laptops for general use, the ASUS ROG Zephyrus G15 and the Lenovo Legion Slim 7 boast high-resolution screens with impressive brightness and clarity, making them great choices for everyday tasks like browsing and video streaming. For engineering and design work, both these laptops deliver with their wide color gamuts, ensuring that professionals who require color accuracy for tasks like photo editing and graphic design are well catered for. However, if you're into fast-paced gaming or 3D modeling, their lower refresh rates may not provide the smooth visuals that are typically desired in such applications, making them less ideal options for these specific needs.
Battery
9.5 Hours
7.0 Hours
The ASUS ROG Zephyrus G15 has 9.5 hours of battery life. The Lenovo Legion Slim 7 has 7 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
8.5/10
7.6/10
The ASUS ROG Zephyrus G15 has very good build quality, while the Lenovo Legion Slim 7 16" has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Although they have very similar scores, PerfectRec considers Lenovo Legion Slim 7 16" to be very good for general use, while the ASUS ROG Zephyrus G15 is good.
The ASUS ROG Zephyrus G15 offers a high-quality screen, ample RAM, and a powerful CPU that results in smooth performance for general use, while its significant battery life and reasonable weight make it fairly portable for daily tasks. The Lenovo Legion Slim 7, on the other hand, pairs its high-quality, slightly larger screen with a robust CPU and enough RAM to handle everyday tasks effectively, with its thinner design and keyboard quality catering to users looking for a blend of performance and convenience, though with a slightly lesser battery life compared to the ASUS.
Content Creation
8.0/10
8.3/10
7.5/10
OVERALL CPU SCORE
9.1/10
2560 x 1440
RESOLUTION
2560 x 1600
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Lenovo Legion Slim 7 16" and ASUS ROG Zephyrus G15 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.
Portability
Good
Good
15.6in
SIZE
16.0in
4.1 lbs
WEIGHT
4.4 lbs
0.7in
THICKNESS
0.6in
The Lenovo Legion Slim 7 16" and ASUS ROG Zephyrus G15 both have good portability.
The most portable laptops are small, thin, and light.
Cost
$1,637
$1,680
$500
$1,000
$1,500
$2,000
$2,500
The ASUS ROG Zephyrus G15 has a price of $1,637 and the Lenovo Legion Slim 7 16" costs $1,680.
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How the ASUS ROG Zephyrus G15 and the Lenovo Legion Slim 7 16" compare to other laptops
"As long as you're aware of the fact that the GeForce RTX 3080 laptop version can only unfold its potential to a limited extent due to Asus's low TDP setting and that it can be slower than a fast RTX 3070 laptop, the ROG Zephyrus G15 GA503Q cuts a fine figure. One of the biggest highlights turns out to be the WQHD panel, since it attracts customers with 165 Hz, relatively fast response times, FreeSync, and good color-space coverage. Other selling points are the surprisingly rich sound, the long battery life, and the sleek design. In terms of looks, the white edition stands out nicely from the competition."
"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."
Get a great deal on the ASUS ROG Zephyrus G15 or the Lenovo Legion Slim 7 16"
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.
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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