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
A meditative physics puzzle about plotting efficient absorption paths while spending mass wisely.

Optimization · Pure Optimization
A gentle turn-based system easily solved by build and gear choices.
Osmos leans Optimization (Pure Optimization); South Park: The Stick of Truth 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.
Osmos
Gentle propulsion nudges need patience more than twitch precision
South Park: The Stick of Truth
Timed attack and block prompts add light input demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Osmos
Solo ambient drift - no adaptive opponent exists
South Park: The Stick of Truth
Enemies follow fixed turn-based scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Osmos
Mote layouts vary slightly but physics are fully visible
South Park: The Stick of Truth
Minor damage rolls; encounters are otherwise fixed
Osmos leans a little harder on optimization, though the gap is small.
Osmos
Planning efficient absorption paths while conserving mass is the game
South Park: The Stick of Truth
Build, gear and ability choices comfortably solve every fight
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.