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

Optimization · Pure Optimization
Solving a civilisation-scale resource and governance puzzle before an ecological deadline.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Eco leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Eco
No twitch element; all actions are build and craft clicks
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Eco leans clearly harder on reads.
Eco
Other players add mild human negotiation reads in multiplayer
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Eco leans a little harder on variance, though the gap is small.
Eco
Meteor timer and ecosystem variables carry some hidden uncertainty
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Eco leans clearly harder on optimization.
Eco
Government systems, specialisation routing, and ecosystem management are richly 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.