head to head
Neither is simply harder - they are hard in different places. Etherlords II demands more variance; The Elder Scrolls V: Skyrim demands more execution.

Optimization · Pure Optimization
Card-battle strategy testing deckbuilding math against draw luck.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Etherlords II leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Etherlords II
Turn-based card play, no dexterity
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Etherlords II leans clearly harder on reads.
Etherlords II
Mostly AI duels; rare human matches add light bluffing
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Etherlords II leans clearly harder on variance.
Etherlords II
Card draws decide what each duel offers
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Etherlords II leans a little harder on optimization, though the gap is small.
Etherlords II
Deck construction and mana sequencing 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.