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

Execution · Light / Casual
An emotional traversal story with light puzzles and almost no skill gate.

Execution · Light / Casual
A collection of short stories about a family's strange deaths.
Sea of Solitude leans Execution (Light / Casual); What Remains of Edith Finch leans Execution (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Sea of Solitude
Gentle traversal and swimming with generous margins
What Remains of Edith Finch
Varied vignettes require light input skill.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sea of Solitude
Monsters are story beats, not adversaries
What Remains of Edith Finch
No adversaries.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Sea of Solitude
The journey is entirely scripted
What Remains of Edith Finch
Stories are fixed.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Sea of Solitude
Light environmental puzzles with single solutions
What Remains of Edith Finch
Little to optimize.
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.