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

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

Optimization · Pure Optimization
Lane defense classic about managing a sun economy against shambling waves.
Anno 1602 leans Optimization (Pure Optimization); Plants vs. Zombies 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.
Plants vs. Zombies
Clicking to plant, minimal pressure
Anno 1602 leans a little harder on reads, though the gap is small.
Anno 1602
AI rivals act on fixed personalities, not adaptation.
Plants vs. Zombies
Zombie waves follow set compositions
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.
Plants vs. Zombies
Wave timing and lane pressure vary mildly
Anno 1602 leans a little harder on optimization, though the gap is small.
Anno 1602
Population tiers and supply chains are a near-pure logistics solve.
Plants vs. Zombies
Sun economy and lane setups are near-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.