I really don't like X portrayal of Bahamut, then again I don't FFX at all so I can't really say it's an unbiased opinion. See the problem with X Bahamut is that when engaging in a vs fight I take out the RPG damage system and base my argument on the level of destruction the blast would do in real terms. In that case FFX Bahamut would be rather inferior, also while all Bahamuts have to charge their attacks, all the others are airborne and therefore more difficult to hit. X Bahamutliesa on the goes to all fours on the ground to charge, he would present a rather easy target in non turn based combat.
Yes but if you look at the size of the blast, the force would easily be enough to level a small town. In comparison FFX Bahamut creates a very small exploxion directly in front of him. In damage system terms the X Bahamut has the stronger attack as it can exceed the standard 9999 damage limit. However I don't use the damage system in VS threads because it is difficult to place the damage it would do to a character from outside of the game.