Did your 335 have RFT? I f so of course there going to feel un comfprtable!
335 18''s RFT versus M3 19''s ps2 = apples and oranges. Go drive an M3 with 18''s oh so comfortable on the road and on the track.
Plus tire manufacyures dont have a huge selection of competion tires in 19''s for the M3 only in 18''s.