Honestly, if you wanted my opinion, F3F > This.
Don't get me wrong, Absu headlining is a fuckin' great thing, but if I had the three day pass for the festival (especially since it's in Austin as opposed to Houston), I wouldn't even think about going anywhere else.
Plus, the others keep mentioning all the bands you'd be skipping, and they're making a pretty good point...
8/14 - Nine Inch Nails
9/16 - Prong
10/23-26 - HHFF
10/28 - Mike Watt
10/29 - Melvins
11/7 - 7 Seconds