head to head
Diablo II asks more than The Elder Scrolls V: Skyrim, and the gap is variance.

Optimization · Pure Optimization
The genre-defining loot ARPG whose builds, runes, and trade economy players still optimize decades later.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Diablo II leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans a little harder on execution, though the gap is small.
Diablo II
Positioning and potion reflexes, little else physical
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.
Diablo II
Monster AI is fully mappable
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Diablo II leans clearly harder on variance.
Diablo II
Loot RNG and random maps drive the grind
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Diablo II leans clearly harder on optimization.
Diablo II
Builds, breakpoints, rune economy, magic-find routing are the game
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.