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
Optimising RPG skill builds and tower placement against scripted enemy waves.

Optimization · Pure Optimization
An open-world JRPG where build construction and art rotation planning win battles.
Defender's Quest: Valley of the Forgotten leans Optimization (Pure Optimization); Xenoblade Chronicles 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.
Defender's Quest: Valley of the Forgotten
Mid-wave placement clicks barely tax the hands
Xenoblade Chronicles
Positioning during auto-attack combat needs minimal dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Defender's Quest: Valley of the Forgotten
Enemy waves march on fixed paths without adapting
Xenoblade Chronicles
Enemy AI runs fixed aggro and art rotations
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Defender's Quest: Valley of the Forgotten
Wave compositions surprise only on first attempts
Xenoblade Chronicles
Drop rates and unexplored zones add mild uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Defender's Quest: Valley of the Forgotten
Skill trees, gear and placement math are the entire test
Xenoblade Chronicles
Art rotations, gem crafting and party builds decide fights
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.