head to head
Marathon asks more than Halo Infinite, and the gap is variance.

Execution · Pure Mechanics
An arena shooter built on precision aim and power-weapon map control.

Execution · Competitive PvP
Aim duels against human crews layered over hidden-information loot gambles and extraction timing.
Halo Infinite leans Execution (Pure Mechanics); Marathon leans Execution (Competitive PvP).
Halo Infinite leans a little harder on execution, though the gap is small.
Halo Infinite
Precision aim and strafe duels dominate.
Marathon
Gunfights against other crews reward raw aim heavily
Marathon leans a little harder on reads, though the gap is small.
Halo Infinite
Adaptive opponents around power weapon timings.
Marathon
Predicting human crews' rotations and ambushes is constant
Marathon leans clearly harder on variance.
Halo Infinite
Spawn flips and weapon drops add noise.
Marathon
Loot spawns and unseen squads create hidden information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Infinite
Map control, weapon timers, and team callouts.
Marathon
Loadout economics and extraction routing sit 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.