Apple MacBook Air 13" M3 vs Apple MacBook Air 15" M4
Both MacBook Air models deliver exceptional value in Apple's lineup, but they serve different needs. Product A offers portability at 1.24kg with the capable M3 chip, ideal for ultralight computing and everyday tasks, though its 8GB RAM and 256GB storage may feel limiting for multitasking or content creation. Product B steps up significantly with a larger 15.3-inch display, newer M4 chip featuring 10-core CPU/GPU, doubled RAM at 16GB, and larger 66.5Wh battery—all critical upgrades for professional work. The 15-inch screen provides noticeably better workspace without sacrificing the claimed 18-hour battery life. While Product B weighs 270g more, the performance gap and expanded screen real estate justify the $200 premium for anyone doing photo editing, development, or running multiple applications. Choose Product A for maximum portability; choose Product B for a versatile all-rounder that won't require upgrades soon.
Full Specifications
| Spec | Apple MacBook Air 13" M3 | Apple MacBook Air 15" M4 |
|---|---|---|
| Software | macOS Sequoia | macOS Sequoia |
| Body | ||
| Weight | 1.24 kg | 3.3 lbs (1.51 kg) |
| Material | Aluminum unibody | Recycled aluminum |
| Dimensions | 304.1 x 215.0 x 11.3 mm | 13.4 x 9.35 x 0.45 inches |
| Ports | ||
| MagSafe | ||
| Thunderbolt ports | 2 | 2 |
| HDMI | — | |
| USB-C ports | — | 2 |
| SD card | — | |
| Battery | ||
| Battery life | Up to 18 hours wireless web | Up to 18 hours |
| Capacity | 52.6 Wh | 66.5 Wh |
| Display | ||
| Size | 13.6 inches | 15.3 inches |
| Type | Liquid Retina IPS LED | Liquid Retina IPS |
| Resolution | 2560 x 1664 | 2880 x 1864 |
| Refresh rate | 60Hz | 60Hz |
| Brightness (nits) | 500 | 500 |
| Storage | ||
| SSD | 256 GB | 256 GB (configurable to 2 TB) |
| Expandable storage | ||
| Keyboard | ||
| Backlit | ||
| Touch Bar | — | |
| Processor | ||
| RAM | 8 GB unified | 16 GB |
| Cores | 8-core CPU, 8-core GPU | 10-core CPU, 10-core GPU |
| Chipset | Apple M3 | Apple M4 |
Category Scores
Pros & Cons
Apple MacBook Air 13" M3
Pros
- Light and portable at 1.24 kg
- Excellent fanless M3 efficiency
- Bright 500-nit Liquid Retina display
- Up to 18 hours of battery life
- Supports two external displays with lid closed
Cons
- 8 GB base RAM increasingly limiting
- Only two Thunderbolt ports
- 256 GB SSD uses single NAND chip with slower speeds
- No high-refresh display
- Limited port selection
Apple MacBook Air 15" M4
Pros
- M4 chip delivers massive performance leap over M3 with hardware-accelerated ray tracing
- 16 GB RAM standard — no more $200 upgrade from 8 GB
- 18-hour battery life is genuinely all-day
- Fanless design is completely silent under all workloads
- Gorgeous 15.3-inch Liquid Retina display for content consumption
Cons
- Still limited to 60Hz display — no ProMotion
- Only two Thunderbolt ports — both on the left side
- Base 256 GB storage is tight for a $1,299 laptop
- No HDMI or SD card slot — dongles still required
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