Raging Blast 1 is meh
Raging Blast 2 is good enough to own, it's similar to Tenkaichi, just not as polished. Although it has it's own things that make it shine.
Ultimate Tenkaichi is like taking the Rock Paper Scissors combat from Budokai 3 and incorporating that into the entire game. Except a coin flip instead. It looks interesting, but you really don't have much control over your character. It reminds me of a Heavy Rain DBZ fighter or something.
I'm sure some purist could (try and) prove you wrong, but yeah. I owned all of the Tenkas and I can't even remember what the story modes in 2 was like. Now, if the collection was Super DBZ/Budokai 3/Tenkaichi 3/Sagas (lol), then there'd be something unique in each game. But this? Nah.