Cloud, why?
Well Squall is a child and you can make that out if you watch his conversations in FF8 closer, he thinks that he can make it alone though he certainly can't without his friends.
Cloud is always alone he never had any fear in him.

Cloud defeated Sephiroth alone while Squall defeated Ultimacia with all his friends :rolleyes2

Cloud's sword can't be compared with that foolish Gunblade thing.
In Kingdom Hearts II Cloud is much stronger than Squall, no?

And finally Cloud is cooler