If you go to the account that this account uses for proof, you'll see that the user (byofrog) admitted that they fudged the specs to make them look identical. This is not a one to one comparison

Doesn't matter how similar it looks though.

The only way to tell is to open up both models and look at individual points of the 3d mesh. If their positions in 3d space match up to, say the hundred-thousandth of a decimal, then it is a copy.

But if the model was scaled or rotated or whatever, there would be no way to prove a case because there wouldn't be a match.

The same thing was done to prove games was lying about copying models from previous games when they claimed that it was too difficult to add all previous monsters into different games because their converter tool was giving them issues.

Sorry to tell you but you are blind.