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

Execution · Light / Casual
A joke shooter testing little beyond willingness to laugh along.

Execution · Light / Casual
Branching interactive thriller where QTE choices decide who survives the Origami Killer case.
GentleMoon 2 leans Execution (Light / Casual); 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.
GentleMoon 2
Basic aiming at slow zombies, nothing demanding
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.
GentleMoon 2
Joke enemies follow simple scripts
Heavy Rain
No adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
GentleMoon 2
Item locations are unknown on a first run only
Heavy Rain
First-run uncertainty about consequences
Heavy Rain leans a little harder on optimization, though the gap is small.
GentleMoon 2
A short fixed checklist of items to collect
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.