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
Short free sokoban puzzler about assembling a harem of sharply dressed demon girls.

Optimization · Pure Optimization
A mechanical journey adventure solved by understanding the logic of its automaton-filled world.
Helltaker 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.
Helltaker
One bullet-dodge finale aside, no dexterity
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.
Helltaker
No opponent
Syberia
NPCs follow scripted dialogue trees with no adaptive modelling
Syberia leans a little harder on variance, though the gap is small.
Helltaker
Fully deterministic puzzles
Syberia
Linear journey with virtually no hidden-information surprises
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Helltaker
Each sokoban level has an exact move solution
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.