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 gritty WWII Call of Duty that introduced the Zombies mode.

Execution · Practiced Mastery
A wrestling game about reversal-timing execution and outguessing opponents in grapples.
Call of Duty: World at War leans Execution (Practiced Mastery); WWE WrestleMania XIX leans Execution (Practiced Mastery).
Call of Duty: World at War leans a little harder on execution, though the gap is small.
Call of Duty: World at War
Twitch gunfights in fast multiplayer lobbies
WWE WrestleMania XIX
Grapple and reversal timing are central to matches
WWE WrestleMania XIX leans a little harder on reads, though the gap is small.
Call of Duty: World at War
Human opponents reward positioning prediction
WWE WrestleMania XIX
Human opponents adapt; reversal timing is a mind game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: World at War
Random lobbies, spawns, and zombie waves
WWE WrestleMania XIX
Reversal windows and momentum add some chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: World at War
Perk loadouts and map control are learnable
WWE WrestleMania XIX
Move sets, stamina and match-type strategy matter underneath
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.