head to head
Call of Duty: Modern Warfare 2 asks more than Mario Strikers Charged, and the gap is execution.

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

Execution · Competitive PvP
Tests shot timing and faking out human defenders amid item-driven chaos.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Mario Strikers Charged 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
Mario Strikers Charged
Timing tackles, charged shots and goalie deflections needs quick hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Mario Strikers Charged
Versus humans, faking shots and baiting tackles drives goals
Mario Strikers Charged leans a little harder on variance, though the gap is small.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Mario Strikers Charged
Items and stage hazards inject swingy chaos into matches
Call of Duty: Modern Warfare 2 leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Mario Strikers Charged
Captain abilities and team builds reward knowing the systems
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.