head to head
Neither is simply harder - they are hard in different places. Divinity: Original Sin II - Definitive Edition demands more optimization; The Elder Scrolls V: Skyrim demands more execution.

Optimization · Pure Optimization
Deep tactical build crafting and elemental combo solving across set-piece turn-based encounters.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Divinity: Original Sin II - Definitive Edition leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Divinity: Original Sin II - Definitive Edition
Turn-based combat removes any physical ceiling
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Divinity: Original Sin II - Definitive Edition leans a little harder on reads, though the gap is small.
Divinity: Original Sin II - Definitive Edition
Optional PvP arena aside, AI follows mappable behaviour
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Divinity: Original Sin II - Definitive Edition leans a little harder on variance, though the gap is small.
Divinity: Original Sin II - Definitive Edition
Initiative rolls, random loot and unknown encounters add spice
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Divinity: Original Sin II - Definitive Edition leans clearly harder on optimization.
Divinity: Original Sin II - Definitive Edition
Build synergies, surface combos and positioning are deeply solvable
The Elder Scrolls V: Skyrim
Skill stacking, enchant loops, and exploits are deeply solvable.
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.
full breakdown
Divinity: Original Sin II - Definitive Edition →
full breakdown
The Elder Scrolls V: Skyrim →