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

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

Reads · Competitive PvP
Pokémon fighting game built on a rock-paper-scissors attack triangle across dual phases.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Pokkén Tournament leans Reads (Competitive PvP).
Call of Duty: Modern Warfare 2 leans a little harder on execution, though the gap is small.
Call of Duty: Modern Warfare 2
Fast time-to-kill rewards raw aim and reflex
Pokkén Tournament
Combos and phase-shift punishes need clean hands
Pokkén Tournament leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Pokkén Tournament
Triangle attack system is live mind-gaming
Call of Duty: Modern Warfare 2 leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Pokkén Tournament
Deterministic outside support timing
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
Pokkén Tournament
Frame data and matchup study reward labbing
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.