Yes, you mean everything that is ice and how you know that they won't add anything?I know, because you are assuming that they will have similar playstyle.Which is stupid assumption, like the specs or not, Blizzard made shure that even specs that would be similar, play differently on gameplay.All Rogue specs and AFF and Shadow, two dot specs but play way differently, with Shadow being more active and Aff being more sit and wait.
Again, you are assuming they would play the same because they use Ice, thats why you are using the only two specs that have ice with strong theme.