head to head
Star Wars: Squadrons asks more than Insurgency: Sandstorm, and the gap is optimization.

Execution · Competitive PvP
Hardcore tactical shooter with lethal TTK.

Execution · Grand Arena
Team-based 5v5 Star Wars starfighter combat with cockpit power management.
Insurgency: Sandstorm leans Execution (Competitive PvP); Star Wars: Squadrons leans Execution (Grand Arena).
Insurgency: Sandstorm leans a little harder on execution, though the gap is small.
Insurgency: Sandstorm
One-shot kills demand pixel-perfect aim
Star Wars: Squadrons
Drifting, aim, and throttle tricks decide dogfights
Insurgency: Sandstorm leans a little harder on reads, though the gap is small.
Insurgency: Sandstorm
Holding angles and pushes are mind games
Star Wars: Squadrons
Human pilots in 5v5 bait, juke, and counter-adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Insurgency: Sandstorm
Very low RNG, near pure skill
Star Wars: Squadrons
Full information maps; little randomness
Star Wars: Squadrons leans clearly harder on optimization.
Insurgency: Sandstorm
Loadout points and class roles tuned
Star Wars: Squadrons
Power management and loadout meta are solvable layers
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.