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

Optimization · Pure Optimization
Day-job hybrid of relaxed spearfishing dives and nightly sushi-bar management.

Optimization · Practiced Mastery
Family-friendly dungeon crawler that swaps Minecraft's building for loot and hack-and-slash.
Dave the Diver leans Optimization (Pure Optimization); Minecraft Dungeons leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dave the Diver
harpoon aiming and sushi-service minigames
Minecraft Dungeons
Dodge-rolls and kiting through mob swarms
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dave the Diver
no adaptive opponent
Minecraft Dungeons
Enemies are scripted hordes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dave the Diver
daily fish spawns and sea changes vary
Minecraft Dungeons
Random loot and enchantment rolls drive power
Dave the Diver leans a little harder on optimization, though the gap is small.
Dave the Diver
restaurant economy and gear upgrades drive progress
Minecraft Dungeons
Gear synergies and enchant builds carry difficulty
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.