When I read this from the Model Pipeline thread:
"F40 M135i xDrive: I don't usually report on non-US models, but I feel I should make an exception here since the US M235i GC will be virtually the same car in a different body. So, here's what to expect: same engine as X2 M35i (300hp version of transverse B48), sport automatic only, xDrive only, M Sport configuration includes as standard: bodywork, suspension (non-adaptive), brakes, steering rack, 18" wheels. Regular sport seats will be standard, with upgraded M Sport seats optional. "
This doesn't strike me as a car that will lack for driving dynamics. I mean, people race Minis and do pretty well. The 228iGC will be softer, sure, but this M-performance version should be set up pretty well.