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

Optimization · Pure Optimization
Optimising a dwarf fortress economy against a randomly generated world.

Optimization · Pure Optimization
Building a team and exploiting type-matchup math against scripted trainers.
Craft the World leans Optimization (Pure Optimization); Pokémon LeafGreen Version leans Optimization (Pure Optimization).
Craft the World leans a little harder on execution, though the gap is small.
Craft the World
Indirect dwarf orders mean hands barely matter
Pokémon LeafGreen Version
Menu-driven turn battles demand no physical skill
Pokémon LeafGreen Version leans a little harder on reads, though the gap is small.
Craft the World
Monster waves follow predictable scripted triggers
Pokémon LeafGreen Version
Trainers are scripted; link battles are a side mode
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Craft the World
Random world generation hides resources until dug out
Pokémon LeafGreen Version
Wild encounters, catch rolls and crits add mappable RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Craft the World
Fortress layout, tech tree and crafting chains are the real game
Pokémon LeafGreen Version
Type matchups and team building are the solvable core
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.