head to head
Grand Theft Auto V asks more than Alien, and the gap is reads.

Execution · Practiced Mastery
A Pac-Man-style routing and dodging test wearing an Alien license.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Alien leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Alien leans a little harder on execution, though the gap is small.
Alien
Maze dodging under drone pursuit is pure timing
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Alien
Drones chase with simple fixed logic, nothing adaptive
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Drone movements vary slightly per attempt
Grand Theft Auto V
Some mission and lobby randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Optimal egg-clearing routes are quickly mappable, Pac-Man style
Grand Theft Auto V
Heists, money loops, builds 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.