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

Execution · Practiced Mastery
First-person parkour against zombies, especially terrifying after dark.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Dying Light leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Dying Light leans a little harder on execution, though the gap is small.
Dying Light
Parkour traversal and melee timing demanding.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Dying Light
Zombie AI scripted, non-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.
Dying Light
Night-hunter encounters bring randomness.
Grand Theft Auto V
Some mission and lobby randomness.
Dying Light leans a little harder on optimization, though the gap is small.
Dying Light
Crafting, blueprints, skill trees solvable.
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.