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
A futuristic city-builder where eco and industrial factions race to settle a flooded Earth.

Optimization · Pure Optimization
Physics bridge-builder where cheaper, weirder solutions are the real game.
Anno 2070 leans Optimization (Pure Optimization); Poly Bridge 2 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 2070
Building and routing, no reflexes
Poly Bridge 2
Mouse-driven building has no dexterity pressure
Anno 2070 leans a little harder on reads, though the gap is small.
Anno 2070
Faction AI is scripted
Poly Bridge 2
No adversary present
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Anno 2070
Map generation varies resources slightly
Poly Bridge 2
Deterministic physics; outcomes are fully replayable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Anno 2070
Eco-versus-industry chains reward exact balancing
Poly Bridge 2
Budget-constrained engineering is a pure optimization problem
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.