head to head
Call of Duty: Modern Warfare 2 asks more than Mega Man Soccer, and the gap is execution.

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

Execution · Competitive PvP
An arcade soccer novelty testing timing around special-shot chaos.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Mega Man Soccer 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
Mega Man Soccer
Sluggish controls still reward shot timing and positioning
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Mega Man Soccer
Human opponents add light positional guessing
Call of Duty: Modern Warfare 2 leans a little harder on variance, though the gap is small.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Mega Man Soccer
Special-shot chaos adds some randomness
Call of Duty: Modern Warfare 2 leans clearly harder on optimization.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Mega Man Soccer
Team composition and special-shot management are shallow 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.