head to head
Grand Theft Auto V asks more than Ultimate Spider-Man, and the gap is reads.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
A cel-shaded open-city adventure where you play both Spider-Man and Venom.
Grand Theft Auto V leans Execution (Practiced Mastery); Ultimate Spider-Man 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.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Ultimate Spider-Man
Swinging momentum and boss chases reward control
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Ultimate Spider-Man
Scripted villains and pedestrians
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Ultimate Spider-Man
Fixed open city with set events
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Heists, money loops, builds learnable.
Ultimate Spider-Man
Race routes and combat upgrades are 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.