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 · Systems & Chaos
A hidden-object search game about spotting items in cluttered themed scenes.

Optimization · Systems & Chaos
Guided detective clue-hunting with hidden answers and minimal challenge.
I Spy Spooky Mansion Deluxe leans Variance (Systems & Chaos); 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.
I Spy Spooky Mansion Deluxe
Clicking found objects, no twitch element
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.
I Spy Spooky Mansion Deluxe
No opponent; it is a solo search
Murdered: Soul Suspect
Demons follow simple fixed patrols
I Spy Spooky Mansion Deluxe leans a little harder on variance, though the gap is small.
I Spy Spooky Mansion Deluxe
Items are hidden in cluttered scenes to discover
Murdered: Soul Suspect
Clues and case answers are hidden until found
Murdered: Soul Suspect leans a little harder on optimization, though the gap is small.
I Spy Spooky Mansion Deluxe
Scanning systematically speeds finds, little deeper system
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.