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.

Variance · Light / Casual
A choice-driven comedy adventure with almost no skill test at all.

Variance · Light / Casual
A painterly hidden-object game testing visual scanning patience.
Tales from the Borderlands leans Variance (Light / Casual); Under Leaves 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.
Tales from the Borderlands
Occasional QTEs are the only physical demand
Under Leaves
Tapping spotted objects requires nothing physical
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Tales from the Borderlands
No opponent of any kind
Under Leaves
No opponent exists
Under Leaves leans a little harder on variance, though the gap is small.
Tales from the Borderlands
Story branches are unknown until chosen
Under Leaves
Object locations are hidden until found - that is the game
Under Leaves leans a little harder on optimization, though the gap is small.
Tales from the Borderlands
Choices barely change outcomes; nothing to solve
Under Leaves
Systematic scanning is the only technique
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.