head to head
Grand Theft Auto: San Andreas asks more than Harry Potter and the Deathly Hallows: Part 2, and the gap is optimization.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Execution · Practiced Mastery
A light test of cover-shooter aim with spells substituting for guns.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Harry Potter and the Deathly Hallows: Part 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Harry Potter and the Deathly Hallows: Part 2
Basic cover-shooter aim with generous targeting
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
Harry Potter and the Deathly Hallows: Part 2
Enemies follow simple fixed scripts
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
Harry Potter and the Deathly Hallows: Part 2
Encounters are identical every run
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Harry Potter and the Deathly Hallows: Part 2
Spell selection per enemy type is a thin solvable layer
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.
full breakdown
Grand Theft Auto: San Andreas →
full breakdown
Harry Potter and the Deathly Hallows: Part 2 →