head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
Arcade monster wrestling testing grapple timing and versus-mode throw mindgames.

Execution · Competitive PvP
A military shooter testing aim with moderate prediction of human opponents online.
King of the Monsters leans Execution (Competitive PvP); Medal of Honor: Warfighter leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
King of the Monsters
Grapple timing and positioning decide monster bouts
Medal of Honor: Warfighter
Gunfights reward aim in both campaign and multiplayer
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
King of the Monsters
Versus humans, throw-tech mindgames add real prediction
Medal of Honor: Warfighter
Human opponents in multiplayer demand positional prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
King of the Monsters
Grapple outcomes carry arcade-era randomness
Medal of Honor: Warfighter
Spawns and engagements add modest unpredictability
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
King of the Monsters
Small movesets converge to known optimal loops fast
Medal of Honor: Warfighter
Class loadouts and map knowledge form a thin layer
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.