The party girls in the Meat King's Party use this models in the GOG version:
http://hitmanhq.com/hitman3/walkthrough/02_meatking/images/23.jpg

However this video shows them using a slightly different model (which i myself remember from back in the day): https://imgur.com/a/U6WbCX0

So which version of the game uses the second version? Is this censorship? What other differences are there across versions?

Did you play it on console back in the days? There is a comment in this thread which claims console got the version with more skin.

Yep. I did some digging too and it appaers to be the case. It's just that i feel i remember seeing the X model back in the day, playing on the PC.