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

Optimization · Pure Optimization
A physics puzzle of engineering Rube Goldberg contraptions to solve fixed goals.
Graveyard Keeper leans Optimization (Pure Optimization); The Incredible Machine 3 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.
Graveyard Keeper
Light action farming inputs
The Incredible Machine 3
Placing parts is untimed, no dexterity needed
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
The Incredible Machine 3
Solo puzzle, nothing to predict
Graveyard Keeper leans a little harder on variance, though the gap is small.
Graveyard Keeper
Minor drop randomness
The Incredible Machine 3
Physics is deterministic, no randomness
The Incredible Machine 3 leans a little harder on optimization, though the gap is small.
Graveyard Keeper
Sprawling tech trees and grind-route efficiency
The Incredible Machine 3
Engineering a working contraption from parts IS the 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.