head to head
Warhammer: Vermintide 2 asks more than Grand Theft Auto: San Andreas, and the gap is execution.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Execution · Practiced Mastery
Co-op melee horde shooter with deep builds.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Warhammer: Vermintide 2 leans Execution (Practiced Mastery).
Warhammer: Vermintide 2 leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Warhammer: Vermintide 2
Melee timing, dodges, headshots demanding
Warhammer: Vermintide 2 leans clearly harder on reads.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Warhammer: Vermintide 2
Specials are scripted, not adaptive
Warhammer: Vermintide 2 leans clearly harder on variance.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Warhammer: Vermintide 2
Director spawns and loot randomize runs
Warhammer: Vermintide 2 leans a little harder on optimization, though the gap is small.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.