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

Optimization · Pure Optimization
Serene puzzler where rewinding time untangles dioramas of childhood memories.
Helltaker leans Optimization (Pure Optimization); The Gardens Between leans Optimization (Pure Optimization).
Helltaker leans a little harder on execution, though the gap is small.
Helltaker
One bullet-dodge finale aside, no dexterity
The Gardens Between
Only scrubbing time forward and back
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Helltaker
No opponent
The Gardens Between
No opposition exists
The Gardens Between leans a little harder on variance, though the gap is small.
Helltaker
Fully deterministic puzzles
The Gardens Between
Deterministic dioramas
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
The Gardens Between
Each island is a clean time-manipulation logic puzzle
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.