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 · Light / Casual
A two-part visual novel that uses a conventional romance setup as a deliberate feint before pivoting to military sci-fi.

Optimization · Pure Optimization
A time-travel mystery where finding the correct sequence of phone interventions is the puzzle.
Muv-Luv leans Optimization (Light / Casual); 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.
Muv-Luv
Menu choices only; no physical demands
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.
Muv-Luv
Routes are fully scripted harem-to-military arcs
Steins;Gate
No opponent; timeline branches are fixed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Muv-Luv
Minimal hidden information in the first entry
Steins;Gate
Phone trigger timing hides branch conditions until discovered
Steins;Gate leans a little harder on optimization, though the gap is small.
Muv-Luv
Completing Muv-Luv and Unlimited to unlock Alternative is a light routing puzzle
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.