Xbox one has separate set of achievements for games

so if a game is out on 360 and One say like BF4 the achievements are separate, just like playing a PC version of a game.

Take Fallout 3 for example uses games for windows live, I have 2 sets of Fallout 3 achievements on my Xbox achievements one PC and the other 360

so good if you want to buy a game on both formats! http://www.eurogamer.net/articles/2013-08-06-you-can-earn-both-xbox-360-and-xbox-one-achievements-for-the-same-game

Fifa!!!!! I might be getting it on 360 as players transfer on UT and also with achievements now.... dont know yet though. Will wait and see if ive saved enough for my Xbox One before i start buying games (other than gta5, thats a must buy).

XBO titles will likely have more achievemnts as well, PC GfWL titles had the exact same achievements as 360 versions!