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.

Execution · Light / Casual
Wordless watercolor platformer about grief, designed never to punish you.

Variance · Light / Casual
An interactive story that tests emotional choice, not skill.
Gris leans Execution (Light / Casual); The Walking Dead leans Variance (Light / Casual).
Gris leans a little harder on execution, though the gap is small.
Gris
Gentle platforming with no fail state
The Walking Dead
Quick-time prompts are forgiving and rarely fail the story
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gris
No opposition at all
The Walking Dead
No opponent - characters follow the script
The Walking Dead leans a little harder on variance, though the gap is small.
Gris
Linear and fully authored
The Walking Dead
Branch outcomes are hidden on a first playthrough only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Gris
Light environmental puzzles with obvious solutions
The Walking Dead
Choices barely gate progress; nothing meaningful to solve
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.