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
A crafting-grind survival loop where efficient resource routing beats any combat skill.

Optimization · Pure Optimization
A charming JRPG carried by familiar evolution and party-build routing.
Last Day on Earth: Survival leans Optimization (Pure Optimization); Ni no Kuni: Wrath of the White Witch 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.
Last Day on Earth: Survival
Tap-to-fight combat with minimal twitch demand
Ni no Kuni: Wrath of the White Witch
Hybrid action-turn combat, low input demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day on Earth: Survival
Other players raid bases but rarely interact live
Ni no Kuni: Wrath of the White Witch
Scripted enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day on Earth: Survival
Loot tables and event spawns add mappable randomness
Ni no Kuni: Wrath of the White Witch
Familiar catch and drop rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day on Earth: Survival
Crafting trees, base layout and energy routing dominate progress
Ni no Kuni: Wrath of the White Witch
Familiar evolution and party routing rewarded
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.