head to head
Resident Evil 4 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
An action-survival loop driven by practiced crowd-control shooting and weapon-upgrade optimisation.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Resident Evil 4 leans Execution (Practiced Mastery).
Resident Evil 4 leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Resident Evil 4
Crowd management requires precise, fast shooting under constant pressure
Resident Evil 4 leans a little harder on reads, though the gap is small.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Resident Evil 4
Ganados follow scripted group patterns, not player modelling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Resident Evil 4
Minor drop RNG from enemies but encounters are fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Resident Evil 4
Weapon upgrading, positioning and merchant economy are 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.