head to head
Dishonored 2 asks more than Grand Theft Auto V, and the gap is optimization.

Optimization · Practiced Mastery
Immersive sim where stacking powers and routes unlocks creative kills.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Dishonored 2 leans Optimization (Practiced Mastery); Grand Theft Auto V 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.
Dishonored 2
Blink, parry, and aim timing matter.
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.
Dishonored 2
Guards scripted; alert patterns fixed.
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.
Dishonored 2
Patrols and chaos rating vary lightly.
Grand Theft Auto V
Some mission and lobby randomness.
Dishonored 2 leans clearly harder on optimization.
Dishonored 2
Powers, routes, ghost runs deeply 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.