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.

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

Optimization · Systems & Chaos
Guided detective clue-hunting with hidden answers and minimal challenge.
Last Day of June leans Optimization (Pure Optimization); Murdered: Soul Suspect 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
Murdered: Soul Suspect
Walking and clue-clicking; demon stealth is trivial
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
Murdered: Soul Suspect
Demons follow simple fixed patrols
Murdered: Soul Suspect leans a little harder on variance, though the gap is small.
Last Day of June
Consequences of changes are hidden until tried
Murdered: Soul Suspect
Clues and case answers are hidden until found
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
Murdered: Soul Suspect
Deduction sequences are guided puzzles with known answers
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.