head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Optimization · Pure Optimization
The classic AD&D CRPG where party planning beats dice luck over time.

Optimization · Pure Optimization
The genre-defining loot ARPG whose builds, runes, and trade economy players still optimize decades later.
Baldur's Gate leans Optimization (Pure Optimization); Diablo II 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.
Baldur's Gate
Pause-and-play needs minimal dexterity.
Diablo II
Positioning and potion reflexes, little else physical
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate
Scripted encounters, no adaptation.
Diablo II
Monster AI is fully mappable
Diablo II leans a little harder on variance, though the gap is small.
Baldur's Gate
AD&D dice rolls throughout.
Diablo II
Loot RNG and random maps drive the grind
Diablo II leans a little harder on optimization, though the gap is small.
Baldur's Gate
Party builds and encounter prep solvable.
Diablo II
Builds, breakpoints, rune economy, magic-find routing are the game
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.