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

Execution · Twitch Chaos
A scarcity-driven aim test under randomised objectives and spawns.

Execution · Twitch Chaos
Kart racing execution moderated by item randomness and learnable track routes.
Contagion leans Execution (Twitch Chaos); Sonic & All-Stars Racing Transformed leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Contagion
Deliberate aim with scarce ammo decides zombie encounters
Sonic & All-Stars Racing Transformed
Drift timing and transforming vehicle control reward practice
Contagion leans a little harder on reads, though the gap is small.
Contagion
Hunted mode pits humans against humans; zombies are mindless
Sonic & All-Stars Racing Transformed
Human racers add light positional mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Contagion
Randomised objectives, spawns and routes reshape every round
Sonic & All-Stars Racing Transformed
Item rolls regularly upend race positions
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Contagion
Resource discipline and map knowledge carry survival
Sonic & All-Stars Racing Transformed
Track shortcuts and drift-boost routes are learnable
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.