The biggest thing about those two clips that is important to note is that the soundtrack is the primary audio focus during those two scenes, the sound effects (except for character voices) are secondary and at a lower level, especially in the TF3 clip. I'd have to do a ride through specifically focusing on sounds and the interaction with the sets and screens, but my first thought is that not only are the two situations acoustically/aurally different, they're also very situationally different from a story point of view, which also affects how you use sound within that kind of setting. The ride score in Spiderman is used in a similar way to the score within the movie clips you selected, and the motion is what immerses you into the sets and story more than the sound effects. With the Transformers ride, my impression (again, just basing it off my casual rides to enjoy it, and not to go through and critique anything specific) is that the experience is much more inclusive in the way you're immersed into the story and action. The sound effects of the battle(s) around you are primary, and every bit as important as the motion of the vehicles.
Just my opinion, of course, and there's probably no truly "correct" view; but with the ride we've been given, I don't believe a score is needed or would add too much to the experience.