> they are worlds apart, build quality, screen quality, weight, battery life, single core & parallel processing, speakers, trackpad - everything
Well, depending on your job and work setup, that might matter more or not. If you're tied to one desk or another, battery life is rather secondary – if you're on international flights a lot, 12 hours of battery are a godsend.
Performance is another matter. Plenty of users have systems that are still basically terminal multiplexers. An ancient i3 with 8 gigs of RAM can do that. Others do heavy processing work, where the M2 just wins.
Ergonomics? Well, do you work with just your laptop? Inside or outside? Totally docked? Trackpad ergonomics or keyboard ergonomics? (classic Apple vs. Thinkpad topic, although they're both worse than 20 years ago, keyboard-wise)
(Generally greybeard me thinks laptops are horribly overrated and -designed, but that's a totally different discussion)