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.

Variance · Light / Casual
Deliberately broken physics sandbox about a goat causing mayhem.

Execution · Light / Casual
A casual underwater shooting-gallery nature game.
Goat Simulator leans Variance (Light / Casual); Sea Life Safari leans Execution (Light / Casual).
Sea Life Safari leans a little harder on execution, though the gap is small.
Goat Simulator
Janky physics resist precision on purpose
Sea Life Safari
light pointing/shooting at fish targets
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Goat Simulator
No opposition; pure sandbox
Sea Life Safari
no opponent, solo nature exploration
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Goat Simulator
Ragdoll chaos is unpredictable but stakes-free
Sea Life Safari
random fish spawns and encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Goat Simulator
Score combos exist but barely matter
Sea Life Safari
minimal systems to master
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.