Building comparison
head to head
Halo 3vsQuake 4
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.
Halo 3
Execution · Pure Mechanics
Trilogy capstone whose equal-start arena multiplayer defined a console generation.
Quake 4
Execution · Pure Mechanics
Fast arena-style shooter mixing a scripted Strogg campaign with twitch multiplayer.
Halo 3 leans Execution (Pure Mechanics); Quake 4 leans Execution (Pure Mechanics).
Halo 3Quake 4
Axis by axis
Execution8 vs 8
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
Quake 4
Aimbot plus strafe-jump inputs dominate both campaign and multiplayer
Reads5 vs 5
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
Quake 4
Multiplayer duels reward predicting human positioning and timing
Variance2 vs 2
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
Quake 4
Spawn and item timing add mild uncertainty
Optimization5 vs 4
Halo 3 leans a little harder on optimization, though the gap is small.
Halo 3
Power-weapon timers and map control
Quake 4
Item control routes and weapon picks are learnable
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.