head to head
Mega Man: The Power Battle 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
Arcade boss-rush testing pattern execution and weakness-order knowledge.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Mega Man: The Power Battle leans Execution (Practiced Mastery).
Mega Man: The Power Battle leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Mega Man: The Power Battle
Boss pattern dodging at arcade pace tests the hands
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
Mega Man: The Power Battle
Robot Masters cycle fixed movesets
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
Mega Man: The Power Battle
Boss selection order barely changes the run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Mega Man: The Power Battle
Weapon-weakness ordering is a solvable puzzle
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.