head to head
Asphalt 9: Legends asks more than Grand Theft Auto: San Andreas, and the gap is execution.

Execution · Practiced Mastery
An arcade mobile racer of nitro boosts, drifts, and card-based car upgrades.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.
Asphalt 9: Legends leans Execution (Practiced Mastery); Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery).
Asphalt 9: Legends leans clearly harder on execution.
Asphalt 9: Legends
Drift and nitro timing on touch or pad
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Asphalt 9: Legends leans a little harder on reads, though the gap is small.
Asphalt 9: Legends
Mostly bots and asynchronous ghosts
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Asphalt 9: Legends leans a little harder on variance, though the gap is small.
Asphalt 9: Legends
Card-pack upgrade rolls
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Grand Theft Auto: San Andreas leans a little harder on optimization, though the gap is small.
Asphalt 9: Legends
Routes, touchdrive lines, and car progression
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.