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

Optimization · Pure Optimization
Space 4X where out-planning the galaxy's economy wins wars before they start.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Galactic Civilizations II: Dread Lords leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Galactic Civilizations II: Dread Lords
Turn-based; zero dexterity
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Galactic Civilizations II: Dread Lords leans a little harder on reads, though the gap is small.
Galactic Civilizations II: Dread Lords
Acclaimed AI still follows mappable doctrines
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Galactic Civilizations II: Dread Lords leans clearly harder on variance.
Galactic Civilizations II: Dread Lords
Galaxy generation and unexplored starts
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Galactic Civilizations II: Dread Lords leans clearly harder on optimization.
Galactic Civilizations II: Dread Lords
Economy sliders, ship design, and expansion math dominate
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.