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 deepest optimization puzzle in the Infinity Engine lineage, rewarding encyclopedic knowledge of 2nd Edition AD&D systems.

Optimization · Pure Optimization
A turn-based RPG where elemental surface interactions reward complete knowledge of combinatorial systems.
Baldur's Gate II: Shadows of Amn leans Optimization (Pure Optimization); Divinity: Original Sin 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 II: Shadows of Amn
Pause-and-plan removes twitch entirely; micro-placement has marginal value
Divinity: Original Sin
Turn-based combat requires zero twitch; positioning is deliberate
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate II: Shadows of Amn
Enemies run scripted behaviour patterns, never modelling your tactics
Divinity: Original Sin
AI opponents use scripted priorities with no player modelling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate II: Shadows of Amn
Loot randomization and enemy ability use create hidden-information layers
Divinity: Original Sin
Elemental surface interactions contain hidden combinatorial space to discover
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Baldur's Gate II: Shadows of Amn
Mage spell sequences, dual-class builds and Spellhold routing define mastery
Divinity: Original Sin
Elemental chain combos and initiative manipulation are systemically 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.