Financially, I think Star Wars is the better game.
But if you're into pinball, Houdini is more interesting. The multiplier rules in Star Wars make the game scoring feel unbalanced to me. An identical game can earn multi billions or just hundreds of millions, depending on a player's knowledge, not flipper skills.
If you don't know the strategy of the button or character, you're at a disadvantage. And the game never felt fun enough to bother learning. Plus, it did feel Stern cookie cutter-ish with long multiballs that you keep resurrecting for endless multi billion score games. It never clicked with me.