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

Optimization · Pure Optimization
A dark psychological point-and-click adventure driven by fixed puzzles and a disturbing story.

Optimization · Pure Optimization
Iterating cause-and-effect sequences to untangle a fixed narrative puzzle.
Fran Bow leans Optimization (Pure Optimization); Last Day of June leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fran Bow
Point-and-click inputs only
Last Day of June
Slow walking and simple interactions, no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fran Bow
No opponents
Last Day of June
No opponent - a fixed narrative system
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fran Bow
Hidden story layers until discovered
Last Day of June
Consequences of changes are hidden until tried
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fran Bow
Fixed puzzle solutions; fully solvable
Last Day of June
Sequencing the four characters' actions is the puzzle
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.