The M5 is definitely the outlier. But the M3 feels much smoother than the M4-2. The M7's shutter feels different to the other non electronic cameras. The Ms with the big shutter speed dial feel different than those with the small ones.
The angled rewind crank feels different to the much more solid straight rod. The solid advance lever Ms (M3, M2, MP, MA) feel different than the hinged ones. etc.
But they all feel great!
Back to the Canon F1. I always thought it was a very cool looking camera - especially the OG - but was confused by the naming convention. Three 'different' cameras all called F1, so I kinda lost interest and just went with Nikon. F, F2, F3...
Also Nikons were/are easier to find.