I just rented a M3 standard range from Hertz for an extended trip through New England. Not sure, but based on the mileage (20,000) probably a 2022. I have a Nov. 2018 M3 Long Range (38,000 miles).
Difference was surprising. Although the Hertz was unloved in that way that all rental cars are, the difference was surprising. Ride was far better - mine feels more nimble, but the ride is often harsh, bouncy and loud over bumps, Hertz felt much more stable and solid (both had 19" wheels). Hertz was markedly quieter and the doors and trunk felt far more heavy and solid, closing with a substantial feeling rather than the tinny noise my 2018 makes. Front seats in the Hertz were noticeably narrower, though. Multiple squeaks and buzzes produced from my back seat hinges and the dash were absent in the Hertz. ALways nice and quiet.
I grew to really like the powered trunk lid - although I don't know that it's worth the $800 Tesla asks for installation of powered trunk on older models like mine.
Hertz standard range was noticeably slower than my long range, even though both are one-motor rear wheel drive.
So, while I have no plan on trading in my 2018 ("paid for" is the best feature in any car), if I had to get a new one I think I would gladly get an updated M3.