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

Execution · Practiced Mastery
A twin-stick looter shooter blending Housemarque arcade reflexes with a loot-grind build layer.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Alienation leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Alienation leans a little harder on execution, though the gap is small.
Alienation
Twin-stick aim and dodge under heavy swarm pressure.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Alienation
Alien hordes never adapt.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Alienation leans a little harder on variance, though the gap is small.
Alienation
Random loot cores and weapon rolls.
Grand Theft Auto V
Some mission and lobby randomness.
Alienation leans a little harder on optimization, though the gap is small.
Alienation
Build and core-socketing choices scale the endgame.
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.