I'm sure they're the same size. Different colourings of a single Grunt model.

Previously, I thought the reason for the red state could simply be due to what order the Grunts occur on a list which plays a part in scene rendering. But now I know an orange state is possible too, that seems to go against that theory. It would help to know more about the game's rendering architecture.

: Also, just thought I'd let you know that 480p is in fact working for me.

Thanks. I had such a report from someone else regarding the previous movie, and I now suspect YouTube has altered how it provides 480p, and that the new methodology is not supported by my relatively old browser. But as long as up-to-date people are getting 480p rather than the crummy 360p I've been seeing, that's the main thing.