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

Optimization · Practiced Mastery
Family-friendly dungeon crawler that swaps Minecraft's building for loot and hack-and-slash.

Optimization · Systems & Chaos
Racing the day cycle to stack items faster than the seed punishes you.
Minecraft Dungeons leans Optimization (Practiced Mastery); Muck 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.
Minecraft Dungeons
Dodge-rolls and kiting through mob swarms
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.
Minecraft Dungeons
Enemies are scripted hordes
Muck
Enemies swarm on simple scripts
Muck leans a little harder on variance, though the gap is small.
Minecraft Dungeons
Random loot and enchantment rolls drive power
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.
Minecraft Dungeons
Gear synergies and enchant builds carry difficulty
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.