head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
An open-world action RPG blending clunky combat timing with long-haul character and faction planning.

Optimization · Pure Optimization
An open world where build optimisation dissolves every combat challenge.
Gothic 3 leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim - Special Edition leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Gothic 3
Real-time melee timing and kiting matter.
The Elder Scrolls V: Skyrim - Special Edition
Combat timing matters little; difficulty bends to your build
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gothic 3
Wildlife and orcs follow fixed AI.
The Elder Scrolls V: Skyrim - Special Edition
Draugr and dragons run scripted AI packages
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Gothic 3
Unknown world content on first run.
The Elder Scrolls V: Skyrim - Special Edition
Loot rolls and radiant quests add minor mapped randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Gothic 3
Learning points, faction routes, and gear progression decide power.
The Elder Scrolls V: Skyrim - Special Edition
Perk, crafting and stealth-archer loops trivially solve combat
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.