head to head
Left 4 Dead asks more than Neon Chrome, and the gap is reads.

Execution · Twitch Chaos
Co-op zombie shooter whose AI Director reshuffles every run to keep teams honest.

Execution · Twitch Chaos
Tests twin-stick aim and build adaptation across procedurally generated cyberpunk floors.
Left 4 Dead leans Execution (Twitch Chaos); Neon Chrome leans Execution (Twitch Chaos).
Left 4 Dead leans a little harder on execution, though the gap is small.
Left 4 Dead
Headshots, melee shoves, and special-infected reaction time
Neon Chrome
Twin-stick aim and cover discipline keep you alive
Left 4 Dead leans clearly harder on reads.
Left 4 Dead
Versus mode adds human ambush mindgames
Neon Chrome
Security forces are scripted spawns, never adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Left 4 Dead
AI Director randomizes hordes, items, and specials
Neon Chrome
Generated floors and enhancement drops vary each run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Left 4 Dead
Team spacing, route choice, and resource discipline
Neon Chrome
Stat upgrades and ability synergies compound across deaths
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.