The M3 chip supports up to 24GB of unified memory, while the MacBook Air M1 tops out at 16GB of RAM. M3 packs an enhanced Neural Engine meant to accelerate machine learning (ML) models.
There are now more versions of the MacBook ... Air, then Currys has a decent £150 off. This is still quite pricey for a non-Pro MacBook, but the M3 is an excellent chip, and it comes with 16GB ...