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.

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

Execution · Pure Mechanics
Forgiving spectacle combat that lightly tests combo execution.
Gravity Rush leans Execution (Practiced Mastery); Star Wars: The Force Unleashed II leans Execution (Pure Mechanics).
Star Wars: The Force Unleashed II leans a little harder on execution, though the gap is small.
Gravity Rush
Aerial gravity-kick aiming takes spatial control
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.
Gravity Rush
Nevi enemies 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.
Gravity Rush
Authored world, minimal randomness
Star Wars: The Force Unleashed II
Encounters are scripted and identical every run
Gravity Rush leans a little harder on optimization, though the gap is small.
Gravity Rush
Gem farming and upgrade priorities
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.