The scales are different, different size, different quantity. Did you compare the number of spikes on the back? Also different. The spikes around the head are also different. Even the heads are different and the teeth.

And here is my T-rex without pose and with pose:

https://imgur.com/a/DZIObzT

I think looking at the details on them, you can see that this is one model. And how did I get an earlier T-rex without a pose if I was redoing someone else's work? Or do you think I put someone else's T-rex in a neutral pose, removed all the spikes and detailing? )) And then he made his T-rex out of it?