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

Optimization · Systems & Chaos
Lovecraftian card game where you decode occult mechanics by failing at them.

Optimization · Pure Optimization
The genre-defining loot ARPG whose builds, runes, and trade economy players still optimize decades later.
Cultist Simulator leans Optimization (Systems & Chaos); Diablo II leans Optimization (Pure Optimization).
Diablo II leans a little harder on execution, though the gap is small.
Cultist Simulator
only timer juggling on cards
Diablo II
Positioning and potion reflexes, little else physical
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cultist Simulator
no adaptive opponent
Diablo II
Monster AI is fully mappable
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Cultist Simulator
opaque mechanics and card draws until mapped
Diablo II
Loot RNG and random maps drive the grind
Diablo II leans a little harder on optimization, though the gap is small.
Cultist Simulator
once decoded, the verb-card economy is solvable
Diablo II
Builds, breakpoints, rune economy, magic-find routing are the game
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.