head to head
Neither is simply harder - they are hard in different places. Call of Duty: Modern Warfare 2 demands more execution; Miscreated demands more variance.

Execution · Competitive PvP
Blockbuster 2009 sequel famous for killstreak chains and frantic multiplayer.

Execution · Competitive PvP
A post-apocalyptic multiplayer survival game defined by tense player encounters.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Miscreated leans Execution (Competitive PvP).
Call of Duty: Modern Warfare 2 leans clearly harder on execution.
Call of Duty: Modern Warfare 2
Fast time-to-kill rewards raw aim and reflex
Miscreated
Gunfights against players demand real aim
Call of Duty: Modern Warfare 2 leans a little harder on reads, though the gap is small.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Miscreated
Hostile survivors adapt, feint, and ambush
Miscreated leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Miscreated
Random loot and unknown player positions drive tension
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Miscreated
Base spots and gear routes are learnable
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.