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

Optimization · Pure Optimization
A long parade of self-contained logic puzzles wrapped in a mystery story.

Optimization · Pure Optimization
A dual-world adventure solved by mapping inventory logic across fantasy and science fiction settings.
Professor Layton and the Diabolical Box leans Optimization (Pure Optimization); The Longest Journey leans Optimization (Pure Optimization).
The Longest Journey leans a little harder on execution, though the gap is small.
Professor Layton and the Diabolical Box
Stylus taps - zero dexterity demand
The Longest Journey
Pure point-and-click with no time pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Professor Layton and the Diabolical Box
No opponent; a parade of standalone brainteasers
The Longest Journey
Scripted fantasy narrative across two worlds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Professor Layton and the Diabolical Box
Puzzles are fixed; only their first encounter surprises
The Longest Journey
Linear world states with essentially no hidden randomness
The Longest Journey leans a little harder on optimization, though the gap is small.
Professor Layton and the Diabolical Box
Each brainteaser has one clean logical solution to find
The Longest Journey
Inventory puzzles require systematic lateral thinking across two realms
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.