Correct, they are supposed to be the same dino. The Dinosaur CTX tie in always felt like to me that they were never sure if they were going to actually tie the 2 together. Besides them using the same species of dinosaurs they don't have that much in common, and even then the dinos had very different looks to them.That had to have been the laziest IP tie-in. And the only good thing to come of it, the iguanadon in the water, was removed. It was meant to be the escaped, rescued dino from the ride, right?
Which does nothing to hide the fact that the ending security monitor footage on the ride was a last minute fix to solve the intended peppers ghost effect.
It looks like they just copy over a rough pre-vis version of the dino from the film.