head to head
Risk of Rain Returns asks more than Grand Theft Auto: San Andreas, and the gap is variance.

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

Optimization · Practiced Mastery
Remake of the original Risk of Rain with new survivors and tighter action.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Risk of Rain Returns leans Optimization (Practiced Mastery).
Risk of Rain Returns leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Risk of Rain Returns
Platforming and aiming demand sharper inputs than original.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Risk of Rain Returns
Scripted enemy behaviour throughout.
Risk of Rain Returns leans clearly harder on variance.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Risk of Rain Returns
Random item pool defines builds run to run.
Risk of Rain Returns 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
Risk of Rain Returns
Survivor kits and routing reward optimization.
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.