head to head
Warhammer: Vermintide 2 asks more than Grand Theft Auto V, and the gap is variance.

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

Execution · Practiced Mastery
Co-op melee horde shooter with deep builds.
Grand Theft Auto V leans Execution (Practiced Mastery); Warhammer: Vermintide 2 leans Execution (Practiced Mastery).
Warhammer: Vermintide 2 leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Warhammer: Vermintide 2
Melee timing, dodges, headshots demanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Warhammer: Vermintide 2
Specials are scripted, not adaptive
Warhammer: Vermintide 2 leans clearly harder on variance.
Grand Theft Auto V
Some mission and lobby randomness.
Warhammer: Vermintide 2
Director spawns and loot randomize runs
Warhammer: Vermintide 2 leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Warhammer: Vermintide 2
Builds, talents, weapon breakpoints solvable
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.