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

Optimization · Practiced Mastery
Gentle minigame variety - flying, potions, duels - with no demanding axis.

Execution · Light / Casual
Branching interactive thriller where QTE choices decide who survives the Origami Killer case.
Harry Potter and the Half-Blood Prince leans Optimization (Practiced Mastery); Heavy Rain leans Execution (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Half-Blood Prince
Quidditch ring-chasing and duel timing are gentle
Heavy Rain
QTE prompts under tension
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 Half-Blood Prince
Duelling NPCs follow simple fixed patterns
Heavy Rain
No adaptive opposition
Heavy Rain leans a little harder on variance, though the gap is small.
Harry Potter and the Half-Blood Prince
Hogwarts tasks are scripted and repeatable
Heavy Rain
First-run uncertainty about consequences
Harry Potter and the Half-Blood Prince leans a little harder on optimization, though the gap is small.
Harry Potter and the Half-Blood Prince
Potion-stirring sequences and castle routing are lightly solvable
Heavy Rain
Branch knowledge fully solves outcomes
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.