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
A pure optimization exercise where sphere grid planning and boss weakness exploitation defines mastery.
Anno 2070 leans Optimization (Pure Optimization); Final Fantasy X 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
Final Fantasy X
Fully turn-based; zero time pressure on inputs
Anno 2070 leans a little harder on reads, though the gap is small.
Anno 2070
Faction AI is scripted
Final Fantasy X
All aeons and fiends operate on fixed AI scripts
Final Fantasy X leans a little harder on variance, though the gap is small.
Anno 2070
Map generation varies resources slightly
Final Fantasy X
Minimal RNG in base game; overdrive gauge charges predictably
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
Final Fantasy X
Sphere Grid routing and break damage limits make the game theoretically 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.