Even for LCI model vs intro model, if you look under big-nerdy glasses would be different too
But in generally speaking put M240i vs M2 next to each other, no need eye glasses to tell the diff
put 340i vs M3 , no glasses either needed here
No question, X3M and X4M will sell since SAV/x-over is hot market right now. I doubt there will be waiting list ala M3/M2 at the intro.