head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

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

Execution · Competitive PvP
Football execution with finer dribble control, human prediction, and bounce luck.
Call of Duty: Black Ops leans Execution (Competitive PvP); FIFA Soccer 10 leans Execution (Competitive PvP).
Call of Duty: Black Ops leans a little harder on execution, though the gap is small.
Call of Duty: Black Ops
Gunfights hinge on aim and reaction speed
FIFA Soccer 10
360-degree dribbling raised the stick-skill ceiling
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 Soccer 10
Outguessing a human defender's tackle timing is constant
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 10
Deflections and keeper randomness swing tight matches
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 10
Formations, tactics and manager mode reward study
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.