head to head
Red Dead Redemption 2 asks more than Harry Potter and the Half-Blood Prince, and the gap is execution.

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

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Harry Potter and the Half-Blood Prince leans Optimization (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Red Dead Redemption 2 leans clearly harder on execution.
Harry Potter and the Half-Blood Prince
Quidditch ring-chasing and duel timing are gentle
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Red Dead Redemption 2 leans a little harder on reads, though the gap is small.
Harry Potter and the Half-Blood Prince
Duelling NPCs follow simple fixed patterns
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Red Dead Redemption 2 leans a little harder on variance, though the gap is small.
Harry Potter and the Half-Blood Prince
Hogwarts tasks are scripted and repeatable
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
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 Half-Blood Prince
Potion-stirring sequences and castle routing are lightly solvable
Red Dead Redemption 2
Loadouts and routes solvable but loose.
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.