head to head
Rage 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
id Software's post-apocalyptic shooter mixing crisp gunplay with buggy racing.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Rage leans Execution (Practiced Mastery).
Rage leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Rage
id-style gunplay precision against agile bandits.
Rage leans a little harder on reads, though the gap is small.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Rage
Enemy mobility is scripted animation, not adaptation.
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
Rage
First-run unknowns in dungeons and loot.
Grand Theft Auto: San Andreas 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
Rage
Crafting, ammo economy, and wingstick usage reward planning.
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.