Products
Apple MacBook Air 15 (M4, 2025)
ASUS Zenbook DUO UX8406 14 (2025)
Tested using Methodology v0.8.3
Updated Aug 19, 2025 12:29 PM
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Amazon.com
Tested using Methodology v0.8.3
Updated Oct 24, 2025 05:03 PM
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Amazon.com
Size
15.3"
Operating System
macOS
Size
14"
Operating System
Windows 11
Our Verdict
Apple MacBook Air 15 (M4, 2025)
ASUS Zenbook DUO UX8406 14 (2025)
The Apple MacBook Air 15 (M4, 2025) and the ASUS Zenbook DUO UX8406 14 (2025) are very different. The former is a traditional clamshell model, while the latter is a dual-screen laptop with a kickstand, a detachable keyboard, and touch/pen input support. Both laptops deliver a great user experience overall, though the MacBook Air comes out slightly ahead, sporting an easier-to-use haptic touchpad, better-sounding speakers, and a much longer battery life. That said, the choice ultimately depends on whether you need a second.
Variants
- MacBook Air 15 (MW1L3LL/A) (Midnight - M4 (10-core CPU/10-core GPU)/16GB/256GB)
- MacBook Air 15 (MW1M3LL/A) (Midnight - M4 (10-core CPU/10-core GPU)/16GB/512GB)
- MacBook Air 15 (MC6L4LL/A) (Midnight - M4 (10-core CPU/10-core GPU)/24GB/512GB)
- MacBook Air 15 (MW1G3LL/A) (Silver - M4 (10-core CPU/10-core GPU)/16GB/256GB)
- MacBook Air 15 (MW1H3LL/A) (Silver - M4 (10-core CPU/10-core GPU)/16GB/512GB)
- MacBook Air 15 (MC6J4LL/A) (Silver - M4 (10-core CPU/10-core GPU)/24GB/512GB)
- MacBook Air 15 (MC7A4LL/A) (Sky Blue - M4 (10-core CPU/10-core GPU)/16GB/256GB)
- MacBook Air 15 (MC7C4LL/A) (Sky Blue - M4 (10-core CPU/10-core GPU)/16GB/512GB)
- MacBook Air 15 (MC7D4LL/A) (Sky Blue - M4 (10-core CPU/10-core GPU)/24GB/512GB)
- MacBook Air 15 (MW1J3LL/A) (Starlight - M4 (10-core CPU/10-core GPU)/16GB/256GB)
- MacBook Air 15 (MW1K3LL/A) (Starlight - M4 (10-core CPU/10-core GPU)/16GB/512GB)
- MacBook Air 15 (MC6K4LL/A) (Starlight - M4 (10-core CPU/10-core GPU)/24GB/512GB)
- Zenbook Duo UX8406 14 (UX8406CA-DS79T) (Inkwell Gray - 3K/Ultra 7 255H/32GB/1TB)
- Zenbook Duo UX8406 14 (UX8406CA-PS99T) (Inkwell Gray - 3K/Ultra 9 285H/32GB/1TB)
- Zenbook Duo UX8406 14 (UX8406CA-DS91T-CA) (Inkwell Gray - FHD/Ultra 9 285H/16GB/1TB)
Main Differences for
School
School
Threshold
School
8.7
7.9
Battery
8.8
7.5
Touchpad
9.6
8.1
Portability
8.7
8.0
Ports
5.0
8.0
Reflections
9.0
6.7
Full Comparison
Design
Style
Style Photo
Form Factor
Traditional (Clamshell)
Traditional (Clamshell)
Build Quality
9.5
9.0
Build Quality Photo
Hinge
9.1
9.4
Hinge Photo
Range
135°
180°
Stability
Good
Good
One Finger Lift
Yes
Yes
Portability
8.7
8.0
Dimensions Photo
Size
15.3"
14"
Thickness
0.6" (1.4 cm)
1.0" (2.5 cm)
Width
13.4" (34.0 cm)
12.4" (31.5 cm)
Depth
9.3" (23.7 cm)
8.7" (22.0 cm)
Volume
68.8 in³ (1,128.1 cm³)
103.6 in³ (1,697.9 cm³)
Weight
3.3 lbs (1.5 kg)
3.8 lbs (1.7 kg)
Charger Size
4.2 in³ (68.6 cm³)
7.2 in³ (118.8 cm³)
Charger Weight
0.4 lbs (0.2 kg)
0.5 lbs (0.2 kg)
Serviceability
3.5
3.8
Internals Photo
Ease Of Access
6.0
6.5
RAM Slots
0
0
Storage Slots
0
0
Replaceable Battery
Yes
Yes
Replaceable Wireless Adapter
No
No
In The Box
In The Box Photo
Display
Screen Specs
Display Photo
Resolution
2880 x 1864
2880 x 1800
Aspect Ratio
16:10
16:10
Pixel Density
224 PPI
242 PPI
Panel Type
IPS
OLED
Touch Screen
No
Yes
Screen-To-Body Ratio
87%
87%
Refresh Rate
5.9
8.7
Motion Blur
Refresh Rate
60 Hz
120 Hz
Variable Refresh Rate
No
Dynamic Refresh Rate
Contrast
7.4
10
Contrast Photo
Native Contrast
1,348 : 1
49,660 : 1
Brightness
8.4
7.3
Maximum Brightness
448 cd/m²
328 cd/m²
Minimum Brightness
2 cd/m²
4 cd/m²
Reflections
9.0
6.7
Reflections Photo Off
Reflections Photo Max
Screen Finish
Glossy
Glossy
Total Reflections
1.61%
5.79%
Indirect Reflections
0.29%
2.37%
Calculated Direct Reflections
1.31%
3.41%
Black Uniformity
7.7
10
Black Uniformity Photo
Uniformity (Std. Dev.)
0.924%
0.256%
Out-Of-The-Box Color Accuracy
9.9
7.7
White Balance Screencap
Gamma Curve Screencap
Color Screencap
Avg. White Balance dE
1.51
1.9
Avg. Gamma
2.23
2.19
Avg. Color dE
0.95
3.9895
Avg. Color Temperature
6,755 K
6,618.2 K
Color Gamut
9.4
9.6
Gamut SDR
sRGB xy
99.99%
149.19%
sRGB uv
99.98%
142.4%
Adobe RGB xy
87.86%
93.77%
Adobe RGB uv
93.21%
97.67%
Gamut HDR
DCI P3 xy
99.47%
99.99%
DCI P3 uv
99.5%
99.99%
Rec. 2020 xy
72.17%
78.81%
Rec. 2020 uv
73.79%
82.1889%
Flicker
9.0
7.2
Flicker Graph
Flicker-Free
No
No
Flicker Frequency
> 1000Hz
480 Hz
Flicker Active Below
100%
100%
Interface
Keyboard
8.0
8.2
Keyboard Photo
Typing Quality
8.0
8.0
Numpad
No
No
Backlighting
Adjustable
Adjustable
Key Switch Actuation Graph
Operating Force
61 gf
62 gf
Actuation Force
37 gf
35 gf
Pre-Travel
0.80 mm
1.00 mm
Total Travel
0.90 mm
1.51 mm
Touchpad
9.6
8.1
Touchpad Photo
Tracking Quality
9.5
8.0
Size
21.4 in² (138.0 cm²)
15.1 in² (97.5 cm²)
Material
Glass
Glass
Dedicated Buttons
No
No
Speakers
8.6
6.8
Frequency Response Plot
Max Volume
77 dB SPL
71 dB SPL
Standard Error @ Normal Vol. (65 dB)
4.4 dB
4.3 dB
Slope @ Normal Vol. (65 dB)
1.8
2.3
Bass Extension (Low-Frequency Ext.)
138 Hz
202 Hz
Treble Extension (High-Frequency Ext.)
16 kHz
8 kHz
Dynamic Range Compression @ Max Vol.
1.7 dB
5.4 dB
Webcam & Microphone
8.7
7.4
Webcam Video Sample
Video Quality
9.0
7.5
Resolution
1080p
1080p
Position
Top Center
Top Center
Privacy Cover
No
No
Face Unlock
No
Yes
Connectivity
Ports
5.0
8.0
Ports Photo
USB-A Ports
0
1
USB-C Ports
2
2
Thunderbolt
Thunderbolt 4
Thunderbolt 4
USB-C Charging
Yes
Yes
USB-C Display Out
Yes
Yes
HDMI
No
2.0
DisplayPort
No
No
3.5mm Jack
Combo mic/headphone
Combo mic/headphone
Card Reader
No
No
Ethernet
No
No
Proprietary Port
Apple MagSafe 3
No
Security Lock
No
No
Wireless Communication
Wi-Fi
Wi-Fi 6E (802.11ax)
Wi-Fi 7 (802.11be)
Bluetooth
5.3
5.4
Configuration
CPU
Brand
Apple
Intel
Model
M4
Core Ultra 9 285H
Core Count
10
16
Thread Count
10
16
GPU
Brand
Apple
Intel
Model
M4
Arc 140T GPU
Dedicated/Integrated
Integrated
Integrated
VRAM Size
N/A
N/A
GPU Total Graphics Power (TGP)
N/A
N/A
RAM
Capacity
16 GB
32 GB
Modules
Unknown
8 (Soldered)
Type
LP-DDR5x
LP-DDR5x
Speed
7,500 MHz
7,467 MHz
Storage
Advertised Capacity
256 GB
1,000 GB
Usable Capacity
211 GB
917 GB
Drive 1
Apple SSD AP0256Z
Western Digital PC SN5000S SDEQNSJ-1T00-1002
Drive 1 Type
SSD
SSD
Drive 2
No 2nd Drive
No 2nd Drive
Drive 2 Type
No 2nd Drive
No 2nd Drive
Performance
Geekbench 5 (Synthetics)
9.5
9.5
Geekbench Image
CPU Single-Thread
2,638 points
2,132 points
CPU Multi-Thread
12,987 points
14,870 points
GPU Compute
40,460 points
42,785 points
Cinebench R23 (CPU Rendering)
9.9
10
Cinebench R23 Photo
Single-Thread
2,175 points
2,117 points
Multi-Thread
12,004 points
16,691 points
Blender (3D Rendering)
9.2
8.9
Blender Image
CPU Render Time
3.0 min
2.2 min
GPU Render Time
0.5 min
N/A
GPU Render Time (Optix)
N/A
N/A
Basemark GPU (Game Scene)
7.5
5.9
Basemark Image
Overall Score
46,774
23,282
Storage Drive Performance
9.3
9.5
Storage Performance Image
Sequential Write Speed
2,802.5 MB/s
1,578.4 MB/s
Sequential Read Speed
3,192.6 MB/s
4,051.6 MB/s
Random Write Speed
46.5 MB/s
104.6 MB/s
Random Read Speed
62.3 MB/s
68.0 MB/s
Battery
8.8
7.5
Capacity
67 Wh
75 Wh
Battery Life (Web Browsing)
11.6 hrs
8.9 hrs
Battery Life (Video Playback)
12.9 hrs
7.8 hrs
Battery Life (Gaming)
3.2 hrs
2.2 hrs
Charge Time
3.0 hrs
2.1 hrs
Borderlands 3
4.2
5.6
Borderlands 3 Graph
Avg. FPS
30 fps
37 fps
1% Low
15 fps
26 fps
0.1% Low
8 fps
14 fps
1% Low Delta
32 ms
12 ms
0.1% Low Delta
94 ms
46 ms
Avg. FPS On Very Low
51 fps
77 fps
Civilization VI
6.4
7.4
Civilization VI Graph
Avg. FPS
43 fps
58 fps
1% Low
29 fps
40 fps
0.1% Low
26 fps
39 fps
1% Low Delta
11 ms
7 ms
0.1% Low Delta
15 ms
8 ms
Avg. FPS On Minimum
80 fps
199 fps
Avg. Turn Time
6.97 s
6.22 s
Counter-Strike 2
0.0
7.3
CS2 Graph
Avg. FPS
N/A
71fps
1% Low
N/A
43fps
0.1% Low
N/A
39fps
1% Low Delta
N/A
9 ms
0.1% Low Delta
N/A
12 ms
Avg. FPS On Low
N/A
188fps
Shadow Of The Tomb Raider
5.3
7.0
SOTTR Graph
Avg. FPS
39 fps
45 fps
1% Low
24 fps
34 fps
0.1% Low
15 fps
33 fps
1% Low Delta
16 ms
7 ms
0.1% Low Delta
41 ms
8 ms
Avg. FPS On Lowest
63 fps
69 fps
Thermals And Noise
8.2
7.8
Keyboard Temps Picture
Keyboard Temp While Idle
25 °C (77 °F)
29 °C (83 °F)
Keyboard Temp Under Load
49 °C (120 °F)
35 °C (96 °F)
Fan Noise While Idle
N/A
25.0 dBA
Fan Noise Under Load
N/A
51.2 dBA
Power & Fan Control App
No
Yes
Performance Over Time
7.3
7.9
Performance Over Time Graph
CPU Temp (Cinebench)
87 °C
81 °C
CPU Perf. Loss (Cinebench)
4% loss
14% loss
GPU Temp (Heaven)
84 °C
66 °C
GPU Perf. Loss (Heaven)
13% loss
0% loss
Additional Features And Software
Software
Operating System
macOS
Windows 11
Additional Software
None
Yes
Extra Features
Biometrics
Fingerprint Sensor
Face Recognition
RGB Illumination
No
No
Touch Pen Support
No Stylus Support
MPP 2.0
Secondary Display
No
Yes
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Apple MacBook Air 15 (M4, 2025)
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Comments
Apple MacBook Air 15 (M4, 2025) vs ASUS Zenbook DUO UX8406 14 (2025): Main Discussion
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