I'm not so sure that they are the same. The left brow looks different, but it's hard to tell for sure.
It could be, but I don't think so, like Snake said the left brows look pretty different. If I were you I would hope they are two different bucks!
I'm gonna go with different deer. Like others said the left brow tine is different, the buck in the earlier picture has a crooked brow compared to a perfectly straight one on the later picture.