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
Macabre management sim about running a medieval cemetery as a business.

Optimization · Pure Optimization
Mobile production-chain and layout optimisation paced by timers.
Graveyard Keeper leans Optimization (Pure Optimization); SimCity BuildIt leans Optimization (Pure Optimization).
Graveyard Keeper leans a little harder on execution, though the gap is small.
Graveyard Keeper
Light action farming inputs
SimCity BuildIt
Tapping menus has no skill floor
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Graveyard Keeper
Villagers run on fixed schedules
SimCity BuildIt
No adversary; trade is asynchronous
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Graveyard Keeper
Minor drop randomness
SimCity BuildIt
Market prices and material drops add mild randomness
Graveyard Keeper leans a little harder on optimization, though the gap is small.
Graveyard Keeper
Sprawling tech trees and grind-route efficiency
SimCity BuildIt
Production chains, layout and currency timing are the whole 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.