15-inch MacBook Air M3 vs 13-inch MacBook Air M3: The 15-inch is the smarter buy for most people

Same M3 chip, same performance — the 15-inch wins on speakers (six vs four), battery life (about an hour more), and screen size, with only a half-pound weight penalty (3.3 lbs vs 2.7 lbs). The 13-inch is better if you’re constantly on the move; otherwise, the 15-inch offers better value.