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

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

Execution · Competitive PvP
Hardcore team shooter where one bullet kills and the HUD tells you nothing.
Halo Infinite leans Execution (Pure Mechanics); Insurgency 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.
Insurgency
One-shot lethality rewards precise aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Infinite
Adaptive opponents around power weapon timings.
Insurgency
Human squads flank and adapt each round
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Infinite
Spawn flips and weapon drops add noise.
Insurgency
No killcam or HUD hides enemy positions
Halo Infinite leans a little harder on optimization, though the gap is small.
Halo Infinite
Map control, weapon timers, and team callouts.
Insurgency
Loadout points and objective route knowledge
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.