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

Optimization · Pure Optimization
A persistent multiplayer 4X testing map-control strategy against other human players.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Cardania: Epoch Wars leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Cardania: Epoch Wars
Strategy clicks, no twitch dimension
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Cardania: Epoch Wars leans clearly harder on reads.
Cardania: Epoch Wars
Live human rivals contesting the map can be predicted
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Cardania: Epoch Wars leans clearly harder on variance.
Cardania: Epoch Wars
Anomalies and shifting maps add hidden information
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Cardania: Epoch Wars leans a little harder on optimization, though the gap is small.
Cardania: Epoch Wars
Resource control and faction strategy dominate the metagame
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.