Smaller screen with less colors(sRGB instead of P3), shorter battery life(16 instead of 18), USB-3 and USB-2 Type-C ports instead of thunderbolt.
Smaller screen with less colors(sRGB instead of P3), shorter battery life(16 instead of 18), USB-3 and USB-2 Type-C ports instead of thunderbolt.
A used m1 air isn't going to have that battery life anyway...