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

Optimization · Pure Optimization
Combat-focused Infinity Engine RPG built on D&D party optimization.

Optimization · Pure Optimization
The 2001 Civilization entry that introduced culture, strategic resources and refined empire micromanagement.
Icewind Dale leans Optimization (Pure Optimization); Sid Meier's Civilization III leans Optimization (Pure Optimization).
Icewind Dale leans a little harder on execution, though the gap is small.
Icewind Dale
Pausable real-time needs little dexterity
Sid Meier's Civilization III
No dexterity in a turn-based interface
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Icewind Dale
Enemies follow fixed AI scripts
Sid Meier's Civilization III
AI personalities are fixed and mappable
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Icewind Dale
D&D dice rolls and random loot tables
Sid Meier's Civilization III
Random maps, resources and combat rolls matter early
Sid Meier's Civilization III leans a little harder on optimization, though the gap is small.
Icewind Dale
Party builds, spell prep, and encounter knowledge
Sid Meier's Civilization III
Corruption math, worker turns and culture borders reward deep optimization
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.