head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

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

Optimization · Pure Optimization
Crafting-tree planning and needs management under light zombie pressure.
Dave the Diver leans Optimization (Pure Optimization); How to Survive leans Optimization (Pure Optimization).
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
How to Survive
Twin-stick zombie kiting needs modest aim
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
How to Survive
Zombies are mindless scripted pressure
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
How to Survive
Scavenged materials and island layouts are unknown until explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dave the Diver
restaurant economy and gear upgrades drive progress
How to Survive
Crafting trees and needs management 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.