Carwin has obvious skills but his wrestling has been somewhat overhyped as of late. Although they both seem to possess natural striking technique, have dynamite for hands, and good size/strength over most HW's in the division, which is always a plus.
I would favor Lesnar if they were to fight primarily because his collegiate credentials on paper are more accomplished and he's the bigger man of the two, having just as much natural athleticism and explosiveness. Carwin could always end it with one punch, but if he can't defend Brock's shot he'll be fending off his back for the entire fight.
Suizida tried to tell me that Jardine's Techno viking monkey style was too much for Vera's overhyped skills but i was to busy nuthugging to listen to 'the truth'