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 · Practiced Mastery
A near-future Call of Duty with squad-focused multiplayer and the Extinction mode.

Execution · Competitive PvP
A wrestling game testing grapple timing and prediction in versus matches.
Call of Duty: Ghosts leans Execution (Practiced Mastery); WCW vs. nWo: World Tour leans Execution (Competitive PvP).
Call of Duty: Ghosts leans a little harder on execution, though the gap is small.
Call of Duty: Ghosts
Fast time-to-kill rewards first-shot aim
WCW vs. nWo: World Tour
Grapple timing and move inputs need precision
WCW vs. nWo: World Tour leans a little harder on reads, though the gap is small.
Call of Duty: Ghosts
Outguessing human routes and peeks matters
WCW vs. nWo: World Tour
Versus play rewards reading opponent grapple attempts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Ghosts
Spawns and lobby matchups add noise
WCW vs. nWo: World Tour
Move reversals and spirit meter add randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Ghosts
Loadout and map knowledge are solvable layers
WCW vs. nWo: World Tour
Move-set knowledge and stamina 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.