Yes they can gain and lose stickers from year to year. I know a guy who has picks of the same deer for 3 years in a row and in this case the sticker switched side from left to right and then the next after that it went from bein a main frame 4x5 to a 5x4 the next year with the stickers still there. Some may question if its the same buck but we are sure of it because the buck had other real distinct charactoristics that made him stand out.

Also with the sheds I think this could easily be the same buck but the years differnece would really make ya htink otherwise as many do. Looking at the sheds both have the same spacing between all tines and shapes, brows are shaped alike, g2 and 3 continue the same shape and lenghts, g4s both curve slightly forward. Though the buck didnt change much in two years its very possible considering food and breeding and the fact this buck could have been at his peek in the year between where you are missing a shed. I would say same buck but ya never know. If those two are brothers or suchthat is one heck of a close match for the bucks to be 2 years diff in age (saying they are 2 years apart in age due to similar masses and when the sheds were found) and have that close of a breeding so IMO I doubt it but like I said ya never know. WCL