No, they used the roar. I was initially put off by the first roar too, but if you listen carefully, Spinosaurus does one of its movie roars when it's squaring off with Tyrannosaurus.
Rewatch the movie again, that sound during the T-rex standoff sounds nothing like how it sounds in the movie.
https://youtu.be/GB3DPX85Kg4
Here are all spinosaurus roars it made during the movie, now tell me which one resembles the one from the species profile.
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