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
Definitive competitive tactical FPS balancing aim mastery with team strategy.

Execution · Competitive PvP
Hardcore team shooter where one bullet kills and the HUD tells you nothing.
Counter-Strike: Global Offensive leans Execution (Competitive PvP); Insurgency leans Execution (Competitive PvP).
Counter-Strike: Global Offensive leans a little harder on execution, though the gap is small.
Counter-Strike: Global Offensive
Spray control and flick precision at the top
Insurgency
One-shot lethality rewards precise aim
Counter-Strike: Global Offensive leans a little harder on reads, though the gap is small.
Counter-Strike: Global Offensive
Anti-stratting and mid-round adaptation
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.
Counter-Strike: Global Offensive
Information hidden until contact
Insurgency
No killcam or HUD hides enemy positions
Counter-Strike: Global Offensive leans a little harder on optimization, though the gap is small.
Counter-Strike: Global Offensive
Utility lineups, economy, and default strats
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.