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

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

Execution · Competitive PvP
Tests quick ball control and outguessing a human defender's tackles.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); International Superstar Soccer Deluxe 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
International Superstar Soccer Deluxe
Pass and shot timing under pressure decide matches
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
International Superstar Soccer Deluxe
Versus a human, faking runs and reading tackles is central
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
International Superstar Soccer Deluxe
Deflections and keeper bounces add light chaos
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
International Superstar Soccer Deluxe
Formations and set-piece routines are learnable 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.