Zkuq on 15 January 2017
I'm a bit out of the loop so there's could be some need for corrections, but I'd say there shouldn't be any major differences. Basically if you're getting a GTX 1080, it should most likely be the same card no matter which version you get. There could be some differences in the cooling solution, or there could be some overclocked editions, but for the most part, it shouldn't matter too much which one you pick (i.e. you should just pick one of the cheapest ones).
Since it's a big thing you're getting though, you might still want to wait for a few more opinions on this. Like I said, I'm a bit out of the loop, so maybe things have stopped making sense or being easy while I've been out of the loop.
