head to head
Hot Wheels Unleashed 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
Toy-car arcade racer about drift-charging boost on loop-the-loop tracks.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Hot Wheels Unleashed leans Execution (Practiced Mastery).
Hot Wheels Unleashed leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Hot Wheels Unleashed
Drift-boost management on twisting plastic tracks
Hot Wheels Unleashed leans clearly harder on reads.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Hot Wheels Unleashed
Online races add light human jockeying
Grand Theft Auto: San Andreas leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Hot Wheels Unleashed
Car unboxing randomness outside races
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
Hot Wheels Unleashed
Car tiers, upgrades, and racing lines
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.