Omega weapon was stronger as one of his attacks did 9998 t all characters and plus its hard to get all your commands unlocked in the castle and by the time you reach omega you may have used all them phoenix downs heroes and potions so your at a disadvantage ultima only does 9999 to one character and has auto haste equipped so it has the same speed as omega at default plus omega had stronger attacks ultima just had basic attack light pillar and gravija. so technically Omega owns it ultima looked better i defeated ultima in my 2nd attempt as i forgot to draw eden from him