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

Optimization · Pure Optimization
Team-building optimisation against fixed trainers with mapped RNG.

Optimization · Pure Optimization
Long-horizon empire optimization over a randomly dealt but mappable map.
Pokémon Ruby Version leans Optimization (Pure Optimization); Sid Meier's Civilization 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.
Pokémon Ruby Version
Turn selection requires no dexterity
Sid Meier's Civilization
Turn-based clicking, zero physical demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Ruby Version
Scripted trainers never adapt to your strategy
Sid Meier's Civilization
AI leaders follow mappable personalities, not adaptive minds
Sid Meier's Civilization leans a little harder on variance, though the gap is small.
Pokémon Ruby Version
Encounter, catch and crit rolls are quickly mapped
Sid Meier's Civilization
Map generation and combat rolls hide early information
Sid Meier's Civilization leans a little harder on optimization, though the gap is small.
Pokémon Ruby Version
Abilities and natures deepen an already solvable type system
Sid Meier's Civilization
Tech routing, expansion and economy 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.