head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Practiced Mastery
A gentle licensed adventure testing basic puzzle matching and collectible hunting.

Execution · Practiced Mastery
Linear postwar crime story driven by cover shootouts and atmosphere.
Harry Potter and the Prisoner of Azkaban leans Optimization (Practiced Mastery); Mafia II leans Execution (Practiced Mastery).
Mafia II leans a little harder on execution, though the gap is small.
Harry Potter and the Prisoner of Azkaban
Simple spell-casting and platforming aimed at younger players
Mafia II
Cover shooting and fistfight timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Prisoner of Azkaban
All enemies and puzzles are fully scripted
Mafia II
Enemies are scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Prisoner of Azkaban
Hidden collectible locations are fixed once discovered
Mafia II
Story missions are fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Prisoner of Azkaban
Matching the right character's spell to each puzzle
Mafia II
Modest; learning encounter layouts
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.