Assuming Nappa is quick enough not to get blitzed, Gaoh would get the 2 finger treatment. Now since we know that at least 2 of the 4 main beasts were continent level, mount turtle tanking such attacks, perhaps Gaoh wouldn't be killed but I doubt it wouldn't harm him to a decent extent. I'll have to go with Nappa most likely. I do think Gaoh is faster but it's so easy for Nappa to level the area.
Yeah it is. That is why we all agree Nappa wins. But he has to be careful. Gaoh has some very impressive sharp attacks and we know he was vulnerable to the Destructo Disc. Also Gaoh's speed feats are probably the better of the 2.