Are we seeing a DIFFERENT 'being'?

Okay, I'll keep this short, as everything I typed up (including photo links) was lost, as I got 'logged out' yet again when I tried to post it all unfortunately! Anyway, I was wanting to suggest that the 'long-limbed creature with claws' that throws the crewmember in the latest trailer 'preview' clip...is NOT the leaping, mutating 'mohawk guy'... The black costume that the 'long-limbed' creature is wearing seems to be quite different from what the mutating(?) 'mohawk guy' and other crewmembers are wearing...and it's strangely-shaped head is largely obscured during the shot. Could this strong, tall, thin, long-limbed creature be an actual 'snorkel-nosed' being which face looks similar to the 'skull' being scanned in the first trailer?... Rather than whoever the tall, muscular, bald being seen during the 'rising chair' shot turns out to be, could this be a brief glimpse of the type of creature that was actually sat in the 'chair' in ALIEN originally?... [i](last try - did you ever get that message I PM'd you a while back Ripley Clone 8? Let me know, thanks)[/i]