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

Optimization · Systems & Chaos
Spotting hidden objects and solving formulaic puzzles at a gentle pace.

Optimization · Systems & Chaos
A wordless surreal exploration game about wandering a sleeping girl's dreamscapes.
Eventide: Slavic Fable leans Optimization (Systems & Chaos); Yume Nikki leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Eventide: Slavic Fable
Clicking hidden objects needs only patience
Yume Nikki
Just walking, no challenge on inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Eventide: Slavic Fable
A scripted fable with no adversary
Yume Nikki
No opponent of any kind
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Eventide: Slavic Fable
Object locations are unknown until spotted
Yume Nikki
Random events and obscure unknown triggers
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Eventide: Slavic Fable
Formulaic puzzles converge fast with genre experience
Yume Nikki
Mapping the dream worlds to find 24 effects
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.