At close ranges (7 yards), I find I am close to the same size groupings as the compact. Past that, is where the flatter shooting compact shines with tighter groupings for me.
Size wise, OWB, I could carry either equally well. IWB, I find the subcompact carries better for me, but this may be just a general size/build thing.
That is just my experience with the subcompacts (obtained before the compact).