The top picture is from the version that people are playing at X05. The two bottom ones seem to be a near finalised version of what Joanna will look like in the finshed game.
Check out the textures in the pics.
The other one wasn't a trailer is was the beginning of a level of what looked a fairly old build of the game with the beginning of another level tacked on at the end. IGN put it up and it spread round the net pretty quickly.