head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
Free-to-play objective shooter from Splash Damage with mercenary classes.

Execution · Pure Mechanics
Trilogy capstone whose equal-start arena multiplayer defined a console generation.
Dirty Bomb leans Execution (Pure Mechanics); Halo 3 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.
Dirty Bomb
Fast strafing gunfights and ability timing need quick hands
Halo 3
Precision aim and grenade-melee timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dirty Bomb
Human teams adapt pushes around objective chokepoints
Halo 3
Equal-start fights reward predicting humans
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirty Bomb
Fixed maps and abilities, minor loadout-card randomness
Halo 3
Equipment pickups and spawn variation
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dirty Bomb
Merc compositions and objective timings reward planning
Halo 3
Power-weapon timers and map control
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.