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

Optimization · Pure Optimization
The 1996 landmark 4X where you guide a civilization from antiquity to the space race.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Sid Meier's Civilization II leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Sid Meier's Civilization II
Turn-based clicking only
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sid Meier's Civilization II
AI civs are exploitable scripts, not adaptive rivals
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Sid Meier's Civilization II leans clearly harder on variance.
Sid Meier's Civilization II
Random maps and hut rolls inject early uncertainty
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Sid Meier's Civilization II leans clearly harder on optimization.
Sid Meier's Civilization II
City spacing, trade routes and tech paths 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.