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 · Twitch Chaos
A hero kart racer where character ability mastery and item variance define competitive results.

Execution · Twitch Chaos
Co-op zombie shooter whose AI Director reshuffles every run to keep teams honest.
Disney Speedstorm leans Execution (Twitch Chaos); Left 4 Dead leans Execution (Twitch Chaos).
Left 4 Dead leans a little harder on execution, though the gap is small.
Disney Speedstorm
Character special timing and boost activation have a real skill ceiling
Left 4 Dead
Headshots, melee shoves, and special-infected reaction time
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Disney Speedstorm
Online grids require reading opponents' item usage
Left 4 Dead
Versus mode adds human ambush mindgames
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Disney Speedstorm
Character ability draws and item pickups create high outcome variance
Left 4 Dead
AI Director randomizes hordes, items, and specials
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Disney Speedstorm
Champion upgrade paths and track routing are solvable progression systems
Left 4 Dead
Team spacing, route choice, and resource discipline
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.