I don't have the AFCK, but I've handled them a couple times. I'd like to get one of my own at some point, but I'm in no rush because I've got a 710 in my pocket at the moment.
What these guys said pretty much sums it up. Also, I think that they did a really great job with the blade-to-handle size ratio on the 710 -- the handle isn't longer than it needs to be to hold the blade, and it's still large enough to be comfortable. Very slim carry, too.