head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
Iterating cause-and-effect sequences to untangle a fixed narrative puzzle.

Optimization · Systems & Chaos
A visual novel first and a light tactics game second, heavy on story.
Last Day of June leans Optimization (Pure Optimization); Utawarerumono: Mask of Deception leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day of June
Slow walking and simple interactions, no dexterity
Utawarerumono: Mask of Deception
Optional timing presses on attacks
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day of June
No opponent - a fixed narrative system
Utawarerumono: Mask of Deception
Enemy AI is scripted and predictable
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Last Day of June
Consequences of changes are hidden until tried
Utawarerumono: Mask of Deception
Light combat RNG in a mostly fixed story
Last Day of June leans a little harder on optimization, though the gap is small.
Last Day of June
Sequencing the four characters' actions is the puzzle
Utawarerumono: Mask of Deception
Easy SRPG battles solved with basic positioning
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.