This is a mildly difficult question for me but I would have to go with butts. I agree that boobs have the better jiggle physics overall but idk I don’t like how nipples look. I don’t like how they have bumps on them. personally butts are smoother and more appealing to look at in my opinion. They are also very talented. They can poop, fart, have diarrhea, and even clench, and boobs cannot do any of that.