Asus is sketchy right now. I don't know the difference between those two boards but Asus warranty is god aweful right now. Plus their boards don't seem as reliable as they once were. Bad combonation.
I prefer Gigabyte myself, but Asus is also good. Anything will do except maybe MSI (overpriced POS, terrible customer service, and compatibility issues).
the gigabyte board is an awesome board. I have 2 of these boards, 1 in my desktop 1 in my soon-to-be server. it has a lot of overclocking options, but even if you don't, it's stable thanks to solid capacitors.