I don't have any experience with the Hankooks, but my cousin had the Grabber AT2s on his Grand Cherokee for a while. It was an all-wheel drive version (not 4WD, it was full time). They were very good in my opinion. They did wear a little fast, but it wasn't bad at all considering he was young and wild at the time and was very hard on them (his was the V8 Cherokee and it wasn't uncommon for him to spin the tires, despite the AWD). They had decent traction off road and seemed to do well on the road.
I can't say they are world class tires, but they seemed very good for the price. We called them discount BFG ATs. They have somewhat similar look and perform ok, for much less money (at the time, I don't know what they go for now).
Just my limited experience with them. Of the two I'd go with the Grabbers, only because I've had at least some experience with them and they were good. Doesn't mean the Hankooks are bad (for all I know they are better), but I have no experience with them.
Last edited by BigTB; 10-14-2014 at 03:50 PM.