head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
A pastel dream-themed rhythm game that removes the note highway and trusts your ears.

Execution · Pure Mechanics
Forgiving spectacle combat that lightly tests combo execution.
Melatonin leans Execution (Pure Mechanics); Star Wars: The Force Unleashed II leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Melatonin
Timing without note highways leans on audio-visual feel
Star Wars: The Force Unleashed II
Combo timing and dodges carry the spectacle combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Melatonin
Scenes are scripted
Star Wars: The Force Unleashed II
Stormtroopers follow simple fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Melatonin
First encounters hide each level's cue language
Star Wars: The Force Unleashed II
Encounters are scripted and identical every run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Melatonin
Internalizing each dream's rhythm pattern
Star Wars: The Force Unleashed II
Upgrade choices barely matter against forgiving difficulty
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.