Hmmm. Gotta say I think it could just be the angle. As for the bandana, if its fabric that would explain any difference in placement, but even if its sculpted and painted there could possibly be some variation there. Maybe the eyebrows are painted thicker on one sample than they are on another making the gap seem bigger or smaller.
I agree. I don't think the sculpt has been tweaked. The bandana looks to be just pushed further down. The headsculpt still looks incredible though imo.