head to head
Call of Duty: Modern Warfare 2 asks more than FIFA Street, and the gap is execution.

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

Execution · Competitive PvP
On-the-ball flair and one-on-one deception in small-sided street matches.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); FIFA Street 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
FIFA Street
Flair moves and trick timing decide 4-on-4 duels
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
FIFA Street
Beating a human marker is feint-versus-anticipation
Call of Duty: Modern Warfare 2 leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
FIFA Street
Compact courts keep outcomes deterministic
Call of Duty: Modern Warfare 2 leans clearly harder on optimization.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
FIFA Street
Reputation grind and team building are light 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.