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 · Systems & Chaos
A paranoid sci-fi thriller where choosing between positive and negative delusions shapes which reality the protagonist inhabits.

Optimization · Pure Optimization
A time-travel mystery where finding the correct sequence of phone interventions is the puzzle.
Chaos;Head leans Optimization (Systems & Chaos); Steins;Gate 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.
Chaos;Head
Reading only; delusion trigger choices are the input
Steins;Gate
Pure reading; phone choices are the only input
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Chaos;Head
Conspiracies are scripted; no adaptive opponent
Steins;Gate
No opponent; timeline branches are fixed
Chaos;Head leans a little harder on variance, though the gap is small.
Chaos;Head
Delusion trigger system hides which mental responses lead to each route
Steins;Gate
Phone trigger timing hides branch conditions until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Chaos;Head
Choosing the correct delusion triggers per scene to reach the true end
Steins;Gate
Mapping exact phone responses to unlock the True End is solvable
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.