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Updated January 10, 2024·
The ASUS ROG Zephyrus G15 generally costs less than the MSI Stealth GS66 and offers a balance of good battery life, performance, and portability, being lighter and having longer battery life conducive for on-the-go use. It's also well-suited for gaming with a quality display. However, if requiring higher refresh rates for competitive gaming or tasks demanding robust graphic performance, like engineering and machine learning, the MSI Stealth GS66 might be a better choice, despite having a shorter battery life and being slightly heavier, which can affect portability. Both have similar processing power and memory, but if storage is crucial, the ASUS has double the storage space of the MSI. 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 for content creation
- Good battery life
- Best in class speakers
Advantages of the MSI Stealth GS66
- Very good overall display quality
- Very good keyboard
Key differences
Screen Quality
7.9
8.1
15.6in
SIZE
15.6in
2560 x 1440
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
360Hz
309.0 nits
BRIGHTNESS
280.0 nits
The ASUS ROG Zephyrus G15 has a better screen than the MSI Stealth GS66 for general use, engineering and design, and content creation, while the MSI Stealth GS66 has a better screen for gaming and AI.
The ASUS ROG Zephyrus G15 offers a display with higher resolution and brightness, which enhances the viewing experience for general use and detailed work in engineering and design by providing sharper images and more vivid colors. For engineering and design tasks, its screen excels due to its wide color coverage, ensuring more accurate color reproduction which is essential for those fields. However, its lower refresh rate compared to gaming-focused screens may disappoint gamers and 3D designers who rely on swift motion handling to track fast-moving visuals smoothly.
Battery
9.5 Hours
5.5 Hours
The ASUS ROG Zephyrus G15 has 9.5 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.
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Key similarities
General Use
7.9
7.7
2560 x 1440
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
309.0 nits
DISPLAY BRIGHTNESS
280.0 nits
9.5 Hours
BATTERY LIFE
5.5 Hours
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
7.5/10
PORTABILITY SCORE
7.5/10
The ASUS ROG Zephyrus G15 and MSI Stealth GS66 are both good for general use.
The ASUS ROG Zephyrus G15 stands out for general use with its higher-resolution screen and longer battery life, providing sharp visuals and lasting power for daily tasks, while still maintaining a good level of portability. On the other hand, the MSI Stealth GS66 offers a higher refresh rate screen which is great for smooth visuals, and also includes a newer CPU, but it has a shorter battery life and is slightly heavier, affecting its portability for everyday carry.
Gaming and AI
7.5
7.8
7.4/10
OVERALL GPU SCORE
7.8/10
2560 x 1440
RESOLUTION
1920 x 1080
165Hz
REFRESH RATE
360Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.5/10
FAN NOISE SCORE
7.5/10
The MSI Stealth GS66 and ASUS ROG Zephyrus G15 are both good for gaming and AI.
The ASUS ROG Zephyrus G15 offers a high-quality display with a 165Hz refresh rate, suitable for smooth gameplay and 3D rendering, backed by an Nvidia RTX 3070 GPU; while the MSI Stealth GS66 provides an extremely high screen refresh rate of 360Hz with a slightly more powerful Nvidia RTX 3070 Ti GPU for even more fluid visuals in gaming and 3D applications.
Engineering and Design
8.0
8.2
7.5/10
OVERALL CPU SCORE
9.1/10
7.4/10
OVERALL GPU SCORE
7.8/10
16.0 GB
RAM
16.0 GB
The MSI Stealth GS66 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
7.7
7.5/10
OVERALL CPU SCORE
9.1/10
2560 x 1440
RESOLUTION
1920 x 1080
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
Although they have very similar scores, PerfectRec considers ASUS ROG Zephyrus G15 to be very good for content creation, while the MSI Stealth GS66 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
7.5
7.5/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
1920 x 1080
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The MSI Stealth GS66 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
15.6in
4.1 lbs
WEIGHT
4.6 lbs
0.7in
THICKNESS
0.7in
The ASUS ROG Zephyrus G15 and MSI Stealth GS66 both have good portability.
The most portable laptops are small, thin, and light.
Build Quality
8.5
8.0
The ASUS ROG Zephyrus G15 and MSI Stealth GS66 both have very good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,637
$1,718
$500
$1,000
$1,500
$2,000
$2,500
$3,000
The ASUS ROG Zephyrus G15 has a price of $1,637 and the MSI Stealth GS66 costs $1,718.
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How the ASUS ROG Zephyrus G15 and the MSI Stealth GS66 compare to other laptops
Spec Comparison
 |  | |
| ASUS ROG Zephyrus G15 | MSI Stealth GS66 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,637 | $1,718 | ||
Release Date | |||
Release Date | May 1, 2021 | April 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 14'' x 9.6'' x 0.78'' | 14.2'' x 9.7'' x 0.71'' | |
Weight | |||
Weight | 4.19 lbs | 4.63 lbs | |
Width | |||
Width | 13.98" | 14.17" | |
Depth | |||
Depth | 9.57" | 9.65" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | AMD Ryzen 9 5900HS | 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 | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 9.5 Hours | 5.5 Hours | |
Battery Capacity | |||
Battery Capacity | 90 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 15.6" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 2560 x 1440 | 1920 x 1080 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 360Hz | |
Display Brightness | |||
Display Brightness | 309 nits | 280 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8.5/10 | 8/10 | |
Portability Score | |||
Portability Score | 7.5/10 | 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 | 6.5/10 | 7.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 6.5/10 | 8.5/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 9.5/10 | 8/10 | |
Webcam | |||
Webcam | No Webcam | 720p | |
Fingerprint Reader | |||
Fingerprint Reader | Yes | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | 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 | 3 | 4 | |
Thunderbolt Version | |||
Thunderbolt Version | N/A | 4 | |
Shopping
ASUS ROG Zephyrus G15
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Dig into reviews and images
NotebookCheck
Florian Glaser | February 2021
"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."
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 ASUS ROG Zephyrus G15 or the MSI Stealth GS66
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 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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