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

Optimization · Pure Optimization
A party-based loot ARPG marching a customizable squad across Aranna against Valdis.
Baldur's Gate leans Optimization (Pure Optimization); Dungeon Siege 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.
Dungeon Siege II
Party combat mostly automates itself
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.
Dungeon Siege II
Enemies follow simple scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate
AD&D dice rolls throughout.
Dungeon Siege II
Random loot and chant rewards
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate
Party builds and encounter prep solvable.
Dungeon Siege II
Party composition, pet raising, skill tree planning
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.