Having the K90 alread you may not notice much of a difference and from that Corsair web page it sounds like it's just the lighting that's different. If you didn't have the K90 and had maybe the K60 then yes I would say you wouild be getting a big performance difference. But they still have the Gherry red keys and the macro ability of the side 18 keys. It's also going to be over $100 so if you got money to burn then go ahead , but I would wait some more to get a good review of any and all features nad how much is actualy changed. It hasn't been released yet so there isn't much on it yet.