Well, first I would note that if Ramza and Orlandu started far enough apart they wouldn't meet for a turn its not hard to imagine a generic character winning.

As for a melee duel, if we take end game stats they can both one shot each other easily, so it is basically whoever can get to the other first. Their speeds are almost identical, and even if you equip Orlandu with Excalibur, who's to say Ramza doesn't get one too? It would then all boil down to the crap shoot of who is on the tile that the game prefers in the tie breaker of equal speeds.

However, Ramza can equip Secret Clothes and Orlandu can't, thus allowing Ramza to win regardless of who goes first.