Apekss :
Chugalug_ :
Yes they can, although the gains may be minimal on the Asus given the already high factory overclock.
I've found that increasing the max voltage limit is enough for 10 series cards, getting my FTW 1080 stable above 2GHz didn't require vcore adjustment at all.
All 10 series cards typically top out around the 2GHz mark though, so all luck of the draw as to how far your card goes, although MSI QC/binning is typically a little better.
If you're overclocking, the Gaming X is what I would go with, if you want the best out of the box experience, the Strix is the way to go.
So should I get a stock one if I want to OC it myself more or what?
If you want to OC it yourself, the EVGA FTW is the best card you can get imo.
Get the FTW DT, it is the same as the FTW Gaming, but comes at stock speeds instead.
Features a PCB with 12 power phases, is the card I personally use at the moment, and I absolutely love it.