The ASUS ROG Zephyrus G15 has a better screen than the Lenovo Legion Slim 5 for content creation, while the Lenovo Legion Slim 5 has a better screen for general use, gaming and AI, engineering and design, and content creation.
PerfectRec’s screen quality scores take into account various important factors that are relevant for different use cases.
Battery
9.5 Hours
7.0 Hours
The ASUS ROG Zephyrus G15 has 9.5 hours of battery life. The Lenovo Legion Slim 5 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
7.8/10
The ASUS ROG Zephyrus G15 has very good build quality, while the Lenovo Legion Slim 5 14" has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
The ASUS ROG Zephyrus G15 and Lenovo Legion Slim 5 14" are both good for general use.
PerfectRec’s General Use Score takes into account the many different features of the laptop that make it more or less suitable for general productivity, web browsing, streaming, video calls, and running a wide variety of apps and programs.
Gaming and AI
7.5/10
7.7/10
7.4/10
OVERALL GPU SCORE
7.3/10
2560 x 1440
RESOLUTION
2880 x 1800
165Hz
REFRESH RATE
120Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.5/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 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
8.0/10
8.4/10
7.5/10
OVERALL CPU SCORE
9.1/10
7.4/10
OVERALL GPU SCORE
7.3/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 are both very good for engineering and design.
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
8.0/10
7.9/10
7.5/10
OVERALL CPU SCORE
9.1/10
2560 x 1440
RESOLUTION
2880 x 1800
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
OLED
Although they have very similar scores, PerfectRec considers ASUS ROG Zephyrus G15 to be very good for content creation, while the Lenovo Legion Slim 5 14" 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
7.4/10
7.9/10
7.5/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
2880 x 1800
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 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
14.5in
4.1 lbs
WEIGHT
3.8 lbs
0.7in
THICKNESS
0.8in
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 both have good portability.
The most portable laptops are small, thin, and light.
Cost
$1,248
$1,295
$600
$800
$1,000
$1,200
$1,400
$1,600
$1,800
$2,000
The ASUS ROG Zephyrus G15 has a price of $1,248 and the Lenovo Legion Slim 5 14" costs $1,295.
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How the ASUS ROG Zephyrus G15 and the Lenovo Legion Slim 5 14" 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 5 Gen 8 acknowledges that a gaming laptop doesn’t have to be as thick as possible and can still ensure adequate cooling when the muscles need flexing. To this end, in the Slim 5 Gen 8, it finds a neat balance of refined, trimmed-down design that still lets its internals cruise (even above their max power ratings). Lenovo then added in some high-end build quality with an altogether excellent keyboard that’s useful for both work and play."
Get a great deal on the ASUS ROG Zephyrus G15 or the Lenovo Legion Slim 5 14"
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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About the laptop team
Joe Golden, Ph.D
CEO and Laptops Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
Craig Russell
Laptops Expert
Craig is a UK-based laptops expert. Craig works in IT, where he recommends and supports laptops and PCs for clients and has been recommending laptops on Reddit for five years.