I don’t have much hands on experience with the newer M340i interior, but based on what I’ve seen in photos and in person, the overall interior difference isn’t huge. For example, there’s a HUGE difference between a 2014 C63 and 2016 C63 sedan interior. The interior and tech are completely new and significant in the 2016 model vs the 2014 model and the change is obvious. Compare the interiors of the F80 M3 to the M340i looks more of a natural and modern facelift that isn’t next generation.

I’ve never heard anyone in this predicament because they never think about the M340i when they can just buy a F80 M3.

People who buy these aren’t buying them for their towing capacity.