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
Island colonisation strategy about balancing population tiers against expanding supply chains.

Optimization · Pure Optimization
Deep tactical build crafting and elemental combo solving across set-piece turn-based encounters.
Anno 1602 leans Optimization (Pure Optimization); Divinity: Original Sin II - Definitive Edition 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.
Anno 1602
Slow real-time pace; no dexterity test.
Divinity: Original Sin II - Definitive Edition
Turn-based combat removes any physical ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Anno 1602
AI rivals act on fixed personalities, not adaptation.
Divinity: Original Sin II - Definitive Edition
Optional PvP arena aside, AI follows mappable behaviour
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Anno 1602
Island fertility layouts and rival starts are hidden initially.
Divinity: Original Sin II - Definitive Edition
Initiative rolls, random loot and unknown encounters add spice
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Anno 1602
Population tiers and supply chains are a near-pure logistics solve.
Divinity: Original Sin II - Definitive Edition
Build synergies, surface combos and positioning are deeply 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.