head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
A co-op teen survival horror where light is a weapon and dead classmates stay dead.

Optimization · Practiced Mastery
A meta puzzle box testing curiosity and one-time discovery more than any repeatable skill.
ObsCure leans Optimization (Practiced Mastery); Pony Island leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
ObsCure
Light aiming and flashlight management
Pony Island
Light arcade hopping segments with low demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
ObsCure
Scripted monster encounters
Pony Island
The devil's tricks are authored scripts, not adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
ObsCure
Permadeath partners and darkness hide information
Pony Island
Meta twists are hidden information that spend on first reveal
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
ObsCure
Resource routing and light tactics are learnable
Pony Island
Code-tinkering puzzles have fixed discoverable solutions
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.