Everybody talks about the "10% rule" with regards to this stuff. If it's 10% different (however the hell you measure that) then it's legal.
Here is the picture I referenced when building my model.
They are not identical, there is lots of differences. As I said before, I didn't use any assets from the game to make this, or any future models I'm working on.
Why are we even talking about this? The only person in the world this could affect is me and I don't remember bringing it up.