I drove an m135i auto. I owned a 135i when it debuted in 2008. Nice car but felt like a fast 125i to me. If someone did a blind fold test at 120kph I wouldn't know the difference. An m car you'd know the difference
So, your whole "blindfold test" difference boils down to which car is less refined at 120Kph (i.e. makes more noise and has a harder suspension). You go boy.