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
Harsh village-builder; balance population, food, and winter.

Optimization · Pure Optimization
A tower defense game about engineering optimal gem combinations against scripted waves.
Banished leans Optimization (Pure Optimization); GemCraft leans Optimization (Pure Optimization).
GemCraft leans a little harder on execution, though the gap is small.
Banished
no mechanical layer
GemCraft
Placing gems and towers has no twitch demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Banished
no opponent
GemCraft
Monster waves are scripted, never adapting to player
Banished leans a little harder on variance, though the gap is small.
Banished
weather, disease events
GemCraft
Wave composition is fixed once a level is known
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Banished
population ratios and food planning
GemCraft
Combining gems for optimal tower output is the entire game
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.