No .... they really, really, really aren't.
The Ark version looks like a big fat beefy creature with huge arms and a huge head. In reality it was small and slim, it had arms that were sideways and extremely small (way smaller than Rex's), and they were very slim. You would have to know almost nothing about Carnotaurus to think those are minor differences, it's like calling saying the difference between Cheetah and a Bear isn't big.
But I will say you are right about Jurassic Park. Then again, I can at least understand where he was coming from, since his inspiration was actually from other species of raptor and not Velociraptors. Besides, I don't actually care either way, it was a joke. Plus they fixed it somewhat.
Eh, its more like the difference between a cheetah and a leopard.
Cheetah and Lion and you have a deal