I have to use cushier grips on my rigid singlespeed. No glove is, IMO, going to have enough padding to make a difference. Too much padding can make things worse (also IMO). It's also a technique thing, like Indy pointed out.

I wear different gloves MTBing because I prefer full-finger gloves, not because the padding is different/better. In fact, my full-finger MTB gloves actually get called upon for road duty in the fall, before it gets cold enough for insulated gloves.