I am not sure that Romney gives us a better chance to win than Wilson, but they are different QBs. Romney is cool and accurate. Wilson is athletic with a big arm. Wilson likes to push it downfield. Romney likes to take what the defense gives.
There isn't a right or wrong with either of those traits; it's just about who leads best and fits best with the offensive mindset.
Honestly, I think that the jury is out. They have both looked very good and suspect at times too. Wilson played much, much better defenses, though. Boise is vastly overrated and Wilson or Hall would very likely have beat them, too.