head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, 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 comic-panel puzzle game where you arrange characters and events to produce a specified story outcome.
Helltaker leans Optimization (Pure Optimization); Storyteller 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
Storyteller
Dragging characters into comic panels needs no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Helltaker
No opponent
Storyteller
No opponent; narrative puzzle arrangement
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Helltaker
Fully deterministic puzzles
Storyteller
Story logic is deterministic
Storyteller leans a little harder on optimization, though the gap is small.
Helltaker
Each sokoban level has an exact move solution
Storyteller
Arranging characters and props into the exact causal sequence that satisfies each title
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.