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

Execution · Competitive PvP
Definitive competitive tactical FPS balancing aim mastery with team strategy.

Execution · Competitive PvP
Hardcore tactical shooter with lethal TTK.
Counter-Strike: Global Offensive leans Execution (Competitive PvP); Insurgency: Sandstorm leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Counter-Strike: Global Offensive
Spray control and flick precision at the top
Insurgency: Sandstorm
One-shot kills demand pixel-perfect aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Counter-Strike: Global Offensive
Anti-stratting and mid-round adaptation
Insurgency: Sandstorm
Holding angles and pushes are mind games
Counter-Strike: Global Offensive leans a little harder on variance, though the gap is small.
Counter-Strike: Global Offensive
Information hidden until contact
Insurgency: Sandstorm
Very low RNG, near pure skill
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: Sandstorm
Loadout points and class roles tuned
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.