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.

Execution · Light / Casual
A meditative underwater journey about swimming through gorgeous ocean vistas.

Variance · Light / Casual
A choice-driven comedy adventure with almost no skill test at all.
ABZÛ leans Execution (Light / Casual); Tales from the Borderlands leans Variance (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
ABZÛ
Gentle swimming controls, no fail states
Tales from the Borderlands
Occasional QTEs are the only physical demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
ABZÛ
No opponents at all
Tales from the Borderlands
No opponent of any kind
Tales from the Borderlands leans a little harder on variance, though the gap is small.
ABZÛ
Scripted reveals, minimal surprise
Tales from the Borderlands
Story branches are unknown until chosen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
ABZÛ
Linear path, nothing to solve
Tales from the Borderlands
Choices barely change outcomes; nothing 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.