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

Execution · Competitive PvP
Early fighting-game execution and spacing, plus mind-games against humans.

Execution · Pure Mechanics
Trilogy capstone whose equal-start arena multiplayer defined a console generation.
Art of Fighting 2 leans Execution (Competitive PvP); 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.
Art of Fighting 2
Spirit-gauge specials and spacing demand drilled precision
Halo 3
Precision aim and grenade-melee timing
Art of Fighting 2 leans a little harder on reads, though the gap is small.
Art of Fighting 2
Human matches turn on baiting and conditioning
Halo 3
Equal-start fights reward predicting humans
Halo 3 leans a little harder on variance, though the gap is small.
Art of Fighting 2
Nothing random in the fixed roster
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.
Art of Fighting 2
Notoriously hard AI patterns are studyable scripts, not minds
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.