I love both of these fighters, but I think Maia, right now just simply has more overall skill, but Hendo is such a fucking shark that I would have no doubt that he'd challenge Demian right now.
Big issue for me would be the grappling aspect, for Hendo is a beast and if he can maintain a relative safety on the groud he won't get caught in too deep of quicksand, Maia is on another plain on the ground, but. I think Hendo kills him with standup, but Maia destroy him in BJJ and subs.
Hendo looked simply sick against Bisping, so I say toss up in this one, edge to the younger Maia.
MY MMA RANKINGS
HW Cain JDS Werdum Cormier Barnett Bigfoot Overeem Mir Browne Nelson
LHW Jones Machida Evans Hendo Goose Teixeira Davis Shogun Mousasi Bader
MW ASilva Belfort Weidman Jacare Okami Rockhold Kennedy Consta Bisping Boetsch
WW GSP Hendricks Condit MacDonald Diaz Maia Fitch Kampmann Ellenberger Pyle
LW Bendo Alvarez Grant Melendez Thomson J.Miller Diaz Pettis Chandler dos Anjos Gray
FW Aldo Mendes Curran Lamas Frankie Zombie Cub Lentz Kawajiri Siver