head to head
Call of Duty: Black Ops asks more than FIFA Soccer 11, and the gap is execution.

Execution · Competitive PvP
Cold War-era shooter pairing twitch multiplayer with the cult Zombies mode.

Execution · Competitive PvP
Football sim testing stick execution and reading a human opponent's tactical habits.
Call of Duty: Black Ops leans Execution (Competitive PvP); FIFA Soccer 11 leans Execution (Competitive PvP).
Call of Duty: Black Ops leans clearly harder on execution.
Call of Duty: Black Ops
Gunfights hinge on aim and reaction speed
FIFA Soccer 11
Pass timing, dribbling and finishing demand stick skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Reading human opponents' positioning and timing
FIFA Soccer 11
Human opponents' defensive habits and attacking patterns must be modelled
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Spawns, care packages, zombies RNG
FIFA Soccer 11
Deflections and keeper behaviour add bounded chaos
Call of Duty: Black Ops leans a little harder on optimization, though the gap is small.
Call of Duty: Black Ops
Class builds, map control, zombies routing
FIFA Soccer 11
Formations, tactics and squad knowledge shape matches
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.