I like the Wildcats. Plus points for me are lots of EVA, which almost acts like a rock plate because of its thickness, and very breathable mesh. Minor points for me are slightly wider last and ‘clunkiness’ of the whole thing.
I prefer the fit of the Mutants. I have read people with a bit wider feet fitting well in these, but they fit me superbly as well – and I have very narrow feet. Toe box is amazingly wide while I can lock down the mid of the foot really well. Also as a triple broken toe sufferer, I like the rubber toe bumper (on the front! not over your toes, which can block toe movement).
The heel to toe transition on the Mutants is very smooth, it feels like a more minimal shoe than it actually is. Quite a difference with the Wildcats especially, but even compared to something like the Montrail Bajadas.
The grip on the Mutants is superb with the fat lugs and sticky rubber – useful in mud as well as to scramble up rock.
Minor points for me are on high mileage days over technical and rocky terrain my feet will feel it. More so than with the Wildcats. I am not sure if my feet will get stronger, but I have had this when I reach 40~50Km, the soles of my feet feel real bruised. Same in the Bajadas even. Also, even though the Mutants are supposed to be have these integrated semi-gaiter like ankle entrance – I do find I actually get more of the occasional dirt inside my shoe. Not a huge deal, but kind of like a reversal of what I expected and I unexpectedly destroyed my socks this way.