I remember that I've posted here, when ROTS was released, that that particular scene could not have take place so fast, like, days after Vader got his suit. Apart from the whole Death Star discussion, the imperial officers were seeing using the OT imperial uniform - or something close to it - and were at their posts and working. Now, I don't remember seeing anything like that on the PT, and I don't remember Palpatine having a shitload of boxes filled with uniforms for his new officers, so...