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 · Practiced Mastery
A free co-op top-down shooter about a marine squad purging alien-infested colonies.

Execution · Practiced Mastery
Cinematic survival action where scavenged resources and stealth carry you through the apocalypse.
Alien Swarm leans Execution (Practiced Mastery); The Last of Us leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Swarm
Top-down aim and friendly-fire discipline
The Last of Us
Aim, stealth timing, and scarce-ammo combat
The Last of Us leans a little harder on reads, though the gap is small.
Alien Swarm
Swarm AI scripted by director triggers
The Last of Us
Enemy AI searches but follows mappable routines
Alien Swarm leans a little harder on variance, though the gap is small.
Alien Swarm
Spawn timing varies modestly
The Last of Us
Encounter layouts unknown first time only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Swarm
Class loadouts and route knowledge decide runs
The Last of Us
Resource crafting and encounter routing
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.