It doesn't really matter if it's the exact same frame. The original shot is only relevant because it shows there was clipping there before, which made me look at the press shot. Same frame or not, the shot from Xbox Wire is unquestionably touched up. Here's a closeup:
I wouldn't worry about it too much. There's still time before launch, and any glitches that remain by then will be plenty visible in reviews and so forth. (The bad normal-mapping on the armor is far more disappointing, I think.)
I'm less interested in what this says about
Ryse or Microsoft, and more interested in the implications for press shots in general. Sure, we all know bullshots have extra resolution and AA, but is this sort of by-hand touchup also common? If the worker was skilled, it could be invisible. If it's truly extensive that wouldn't be surprising, but it would be a little distasteful to me.