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

Optimization · Pure Optimization
A turn-based RPG where system mastery and build optimization decide every fight.

Optimization · Pure Optimization
An auto-battling deckbuilder about building a loop to defeat the Lich.
Divinity: Original Sin - Enhanced Edition leans Optimization (Pure Optimization); Loop Hero 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.
Divinity: Original Sin - Enhanced Edition
no real-time physical skill, turn-based
Loop Hero
Autobattler, almost no inputs.
Divinity: Original Sin - Enhanced Edition leans a little harder on reads, though the gap is small.
Divinity: Original Sin - Enhanced Edition
co-op has light unpredictability, mostly solo
Loop Hero
Enemies follow scripts.
Loop Hero leans a little harder on variance, though the gap is small.
Divinity: Original Sin - Enhanced Edition
dice rolls and loot are randomized
Loop Hero
Card draws and loot drops randomize.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Divinity: Original Sin - Enhanced Edition
builds, combos, and tactics near-solvable
Loop Hero
Deck and tile placement reward deep optimization.
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.