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

Execution · Pure Mechanics
Trilogy capstone whose equal-start arena multiplayer defined a console generation.

Execution · Pure Mechanics
Free-to-play military shooter mixing class-based PvP with co-op missions.
Halo 3 leans Execution (Pure Mechanics); Warface leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 3
Precision aim and grenade-melee timing
Warface
Aimbot dominates gunfights; recoil control and flick aim decide duels.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 3
Equal-start fights reward predicting humans
Warface
Human PvP positioning and peek mind-games in versus modes.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 3
Equipment pickups and spawn variation
Warface
Spawn and enemy position uncertainty, minor.
Halo 3 leans a little harder on optimization, though the gap is small.
Halo 3
Power-weapon timers and map control
Warface
Loadout grind and class synergy matter but are mappable.
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.