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

Optimization · Systems & Chaos
Gothic turn-based roguelike where managing stress and bad dice is the real fight.

Optimization · Systems & Chaos
A deckbuilding roguelike where adapting builds to random offers wins runs.
Darkest Dungeon leans Optimization (Systems & Chaos); Slay the Spire 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.
Darkest Dungeon
turn-based, no dexterity
Slay the Spire
Turn-based, zero input precision required.
Slay the Spire leans a little harder on reads, though the gap is small.
Darkest Dungeon
no adaptive opponent
Slay the Spire
Enemy intents shown; behaviour scripted, not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Darkest Dungeon
crits, stress events, and dungeon rolls punish plans
Slay the Spire
Card and relic offers drive every run.
Slay the Spire leans a little harder on optimization, though the gap is small.
Darkest Dungeon
party comps and risk management are deeply solvable
Slay the Spire
Deck shaping and combat math are solvable.
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.