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
A time-travel mystery where finding the correct sequence of phone interventions is the puzzle.

Optimization · Pure Optimization
A heartfelt WWI puzzle adventure following four lives through the trenches.
Steins;Gate leans Optimization (Pure Optimization); Valiant Hearts: The Great War leans Optimization (Pure Optimization).
Valiant Hearts: The Great War leans a little harder on execution, though the gap is small.
Steins;Gate
Pure reading; phone choices are the only input
Valiant Hearts: The Great War
Gentle timing in a few chase sequences
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Steins;Gate
No opponent; timeline branches are fixed
Valiant Hearts: The Great War
No opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Steins;Gate
Phone trigger timing hides branch conditions until discovered
Valiant Hearts: The Great War
Fixed puzzles, fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Steins;Gate
Mapping exact phone responses to unlock the True End is solvable
Valiant Hearts: The Great War
Simple inventory and environmental puzzles with set solutions
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.