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

Execution · Practiced Mastery
Gravity-shifting action adventure about falling sideways through a floating city.

Execution · Practiced Mastery
Comedy FPS where talking guns crack jokes through an alien bounty-hunting romp.
Gravity Rush leans Execution (Practiced Mastery); High on Life leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Gravity Rush
Aerial gravity-kick aiming takes spatial control
High on Life
Standard FPS aim and movement gadgets
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gravity Rush
Nevi enemies are scripted
High on Life
Bounty targets are scripted bosses
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Gravity Rush
Authored world, minimal randomness
High on Life
Fixed encounters and levels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Gravity Rush
Gem farming and upgrade priorities
High on Life
Gun ability combos and exploration upgrades
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.