head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Cozy space exploration and base-building sandbox.

Optimization · Pure Optimization
Draw crayon shapes that become physics objects to roll a ball to a star.
Astroneer leans Optimization (Pure Optimization); Crayon Physics Deluxe 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.
Astroneer
Light terrain tool inputs
Crayon Physics Deluxe
Freehand drawing needs only rough motor control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Astroneer
No adaptive opponents
Crayon Physics Deluxe
No opponent exists
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Astroneer
Planet resource distribution
Crayon Physics Deluxe
Physics wobble makes contraptions slightly unpredictable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Astroneer
Base layout, power chains, automation
Crayon Physics Deluxe
Each level rewards inventing an efficient contraption
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.