Well, Asus rog strix has slightly higher clocks out of the box, so if you don't plan overclocking in the future it's like +1fps for gaming
http://www.game-debate.com/gpu/index.php?gid=3596&gid2=3585&compare=Nvidia%20GeForce%20GTX%201070%20EVGA%20FTW%20Gaming%20ACX%203.0%208GB%20Edition-vs-Nvidia%20GeForce%20GTX%201070%20Asus%20ROG%20Strix%20Gaming%20OC%208GB%20Edition