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.

Variance · Systems & Chaos
Careful descent through procedural depths balancing survival systems against permadeath.

Optimization · Systems & Chaos
Racing the day cycle to stack items faster than the seed punishes you.
Below leans Variance (Systems & Chaos); Muck leans Optimization (Systems & Chaos).
Below leans a little harder on execution, though the gap is small.
Below
Stamina-based combat punishes sloppy dodges and swings
Muck
Kiting bosses and dodging demands basic action skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Below
Creatures and the Darkness follow rules, not minds
Muck
Enemies swarm on simple scripts
Below leans a little harder on variance, though the gap is small.
Below
Procedural floors, traps and loot reshape every descent
Muck
Seeds, chest rolls and item drops shape every run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Below
Survival crafting and trap knowledge converge with experience
Muck
Power-stacking economy and day-loop routing decide survival
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.