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 · Competitive PvP
The pioneering large-scale WWII shooter built on combined-arms map chaos.

Execution · Twitch Chaos
A scarcity-driven aim test under randomised objectives and spawns.
Battlefield 1942 leans Execution (Competitive PvP); Contagion 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.
Battlefield 1942
Aim, vehicle handling, and leading shots matter.
Contagion
Deliberate aim with scarce ammo decides zombie encounters
Battlefield 1942 leans a little harder on reads, though the gap is small.
Battlefield 1942
Human teams adapt flanks and vehicle pushes.
Contagion
Hunted mode pits humans against humans; zombies are mindless
Contagion leans a little harder on variance, though the gap is small.
Battlefield 1942
64-player chaos and spawns add noise.
Contagion
Randomised objectives, spawns and routes reshape every round
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1942
Map control and vehicle timing learnable.
Contagion
Resource discipline and map knowledge carry survival
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.