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 · Competitive PvP
Hardcore team shooter where one bullet kills and the HUD tells you nothing.

Execution · Competitive PvP
Reflex dodging plus predicting where human opponents will commit, round after round.
Insurgency leans Execution (Competitive PvP); Laser League leans Execution (Competitive PvP).
Insurgency leans a little harder on execution, though the gap is small.
Insurgency
One-shot lethality rewards precise aim
Laser League
Split-second dodges through moving laser walls decide rounds
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Insurgency
Human squads flank and adapt each round
Laser League
Node fights are constant prediction of human positioning
Insurgency leans a little harder on variance, though the gap is small.
Insurgency
No killcam or HUD hides enemy positions
Laser League
Power-up spawns add minor noise
Insurgency leans a little harder on optimization, though the gap is small.
Insurgency
Loadout points and objective route knowledge
Laser League
Class picks and node priorities are a thin strategy layer
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.