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
A pausable tactics RPG where party build and tactic-slot planning win fights.

Optimization · Pure Optimization
A 3rd Edition ruleset combat puzzle where multi-classing and feat selection unlock dominant strategies.
Dragon Age: Origins leans Optimization (Pure Optimization); Icewind Dale 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.
Dragon Age: Origins
Tactical pause combat, low input demand
Icewind Dale II
Real-time-with-pause negates twitch requirements
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Age: Origins
Enemy AI is scripted
Icewind Dale II
Scripted enemy routines offer nothing to read or predict adaptively
Icewind Dale II leans a little harder on variance, though the gap is small.
Dragon Age: Origins
Hidden rolls and loot tables
Icewind Dale II
3E feat combinations and hidden enemy resistances create unknown-information layers
Icewind Dale II leans a little harder on optimization, though the gap is small.
Dragon Age: Origins
Tactics slots, builds, party synergy dominate
Icewind Dale II
3rd Edition feat optimization and multi-class architecture dominate success
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.