head to head
Grand Theft Auto: San Andreas asks more than American Chopper, and the gap is optimization.

Execution · Practiced Mastery
Licensed bike riding and building that asks little beyond basic handling.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.
American Chopper leans Execution (Practiced Mastery); Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery).
American Chopper leans a little harder on execution, though the gap is small.
American Chopper
Bike handling on missions is the only real demand
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
American Chopper
AI riders follow fixed lines
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Grand Theft Auto: San Andreas leans a little harder on variance, though the gap is small.
American Chopper
Courses and missions are scripted
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Grand Theft Auto: San Andreas leans clearly harder on optimization.
American Chopper
Chopper part choices matter, but shallowly
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.