GTX 950 vs GTX 1060

Solution
the simple answer is yes the gtx 1060 6gb (the 3gb doesn't have the same potential and i can't recommend) can do almost everything the 950 can do at twice the speed although its about x1.5 the amount of frames in the case of games
if you play overwatch you might have got 60 - 70 fps however on the 1060 you can get around about 100; provided your cpu doesn't create a bottle neck
the simple answer is yes the gtx 1060 6gb (the 3gb doesn't have the same potential and i can't recommend) can do almost everything the 950 can do at twice the speed although its about x1.5 the amount of frames in the case of games
if you play overwatch you might have got 60 - 70 fps however on the 1060 you can get around about 100; provided your cpu doesn't create a bottle neck
 
Solution
i would say go for the gtx 1060 6gb but if you can save and extra £100/$129/€109/¥14281 you should get the gtx 1080 especially if you want to play ark but with most games a 1060 6gb should run at max settings 45+ fps