It does look like ThreeZero pulled from a few different references for these.
That's quite interesting. I wonder what the thought process is behind that.
It may not have been a thought process, it might have been part of the license, they may have been told here are your reference materials, make your figures from this, and they didn't look beyond that.
It's certainly an aspect of the hobby I'd love to get a peak into.
Even with abundance of reference, companies still make mistakes. Hot Toys put full length tabbards in the back of their ROTS Obi-Wan figure when he never had that in any of the prequel films, makes you wonder why they even thought that was right.
In both cases, MMPR and Star Wars, there is no shortage of other figures to reference for these details in some way. I do know outside of select social media pages, MMPR reference shot aren't as abundant as we may like.