So I know I've made this topic before but it was many, many years ago. Pretty sure this board didn't even have YouTube tags then. (I think I'm posting the exact same video though)
Everything about Ultima Weapon in this game is perfect. You go through this eerie, optional dungeon full of the strongest monsters in the game. You're steadily creeping lower and lower, consciously battling monsters while unconsciously puzzling over the mystery of why this place was abandoned.
Finally you reach the bottom.
You... activate it, as Ocelot might say.
Then bam, an alarm goes off. You have no clue what's going on. Red lights are flashing, rocks are resonating and WTF.
Heartbeat thump....heartbeat thump....heartbeat thump....
Then abruptly the fight is underway! "Only A Plank Between One and Perdition" is playing, one of FFVIII's best and most intense tracks. And so it appears, Ultima Weapon, looking like the badass of badasses with his giant sword.
Quite frankly, Omega Weapon has nothing on that level of build-up or intensity, even if it is harder. It doesn't even look as cool. Also it uses the crappy normal boss music. Ultima got the aforementioned superb track choice of "Only A Plank Between One and Perdition."
VIII Ultima Weapon is the best Ultima Weapon. Accept no substitutes.