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
Gentleman puzzler solves a village full of standalone brainteasers.

Optimization · Pure Optimization
A mechanical journey adventure solved by understanding the logic of its automaton-filled world.
Professor Layton and the Curious Village leans Optimization (Pure Optimization); Syberia 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.
Professor Layton and the Curious Village
Stylus taps only; no dexterity pressure at all
Syberia
Walking and clicking; zero reflex demand
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 Curious Village
No opponent, adaptive or otherwise
Syberia
NPCs follow scripted dialogue trees with no adaptive modelling
Professor Layton and the Curious Village leans a little harder on variance, though the gap is small.
Professor Layton and the Curious Village
Puzzle answers are hidden until reasoned out, then fixed
Syberia
Linear journey with virtually no hidden-information surprises
Professor Layton and the Curious Village leans a little harder on optimization, though the gap is small.
Professor Layton and the Curious Village
Every brainteaser has one clean solvable answer
Syberia
Mechanical clockwork puzzles require mapping part relationships
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.