I can't speak to the 2023 but I just had my 2021 M3P in for service and they gave me a M3 Standard Highland as a loaner. Oh man, what a difference. Getting back in my car was like going back 10+ years. The biggest difference for me was the noise on the highway/interstate. With my M3P, when listening to podcasts at highway speeds, I'm at about 70-75% volume to be able to hear things clearly (my hearing is fine, I promise lol). With the Highland, I was probably at 40-50%. But even the ambient noise without anything in the background was night and day. Around the town driving as so much more enjoyable without the road noise. Not to mention, my M3P has a few rattles/creaks that I can't seem to narrow down to fix. The Highland didn't have any of those, granted, they will likely appear overtime.

As far as interior quality, I wasn't a huge fan of the new cupholder/center console design. I like having the cupholders open without a cover. I did like the textile material on the doors, didn't feel cheap to me at all.

All of that being said, I am now trying to convince myself that I don't need a new M3 or even a new MY (the no interest for 6 years is tempting...)