head to head
Call of Duty: Black Ops asks more than FIFA 06: Road to FIFA World Cup, and the gap is execution.

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

Execution · Competitive PvP
A soccer simulation testing ball-control execution and reading human opponents.
Call of Duty: Black Ops leans Execution (Competitive PvP); FIFA 06: Road to FIFA World Cup 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 06: Road to FIFA World Cup
Passing, shooting and movement timing decide matches
Call of Duty: Black Ops leans a little harder on reads, though the gap is small.
Call of Duty: Black Ops
Reading human opponents' positioning and timing
FIFA 06: Road to FIFA World Cup
Human opponents can be read; AI is scripted
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 06: Road to FIFA World Cup
Some randomness in ball physics and outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Class builds, map control, zombies routing
FIFA 06: Road to FIFA World Cup
Formations, tactics and player management matter
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.