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

Optimization · Pure Optimization
An alpine horror tale testing puzzle deduction and exploration under light dread.

Optimization · Pure Optimization
Open-world detective work testing evidence deduction without hand-holding.
Mundaun leans Optimization (Pure Optimization); The Sinking City leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mundaun
Sparse hostile encounters need only basic evasion
The Sinking City
Clunky combat is deliberately undemanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mundaun
The valley's horrors follow folk-tale scripts
The Sinking City
Monsters and citizens follow fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mundaun
Alpine secrets are hidden until uncovered
The Sinking City
Case clues are hidden information until investigated
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mundaun
Hand-crafted puzzles and routes have fixed solutions
The Sinking City
Cross-referencing evidence and city archives is the deduction core
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.