the pic in the first post is so much better than the official pic thats been floating around today ...
I don't like his look in the other photo at all... he got a chris eccleston type outfit, modern black jacket and black sweater (its only shoulders up). The worst part of th other picc was his hair, though... it looked like shit, knot-ridden and dirty, too.
But I have faith in moffat , and he wouldnt have cast this guy unless he was right (although lets be honest, Oliver from coupling was just about the worst idea and casting choice, ever!)
EDIT; THe other pic (which is very contradictory to the other picture, and frankly has me worried, to say the least):

-- Can you say grease-ball?
So what do we think-- Which is the real outfit? He could easily be wearing the professor outfit from the first post for some role hes playing within the episode-- and its less likely he'd wear the modern one for a reason like that.