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
Combo-driven brawling through scripted encounters with light upgrade choices.

Execution · Pure Mechanics
Forgiving spectacle combat that lightly tests combo execution.
Deadpool 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.
Deadpool
Combo juggling and dodge timing carry the combat
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.
Deadpool
Enemy waves attack from fixed scripts
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.
Deadpool
Encounters are deterministic once seen
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.
Deadpool
Upgrade picks and combo routes are shallow but present
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.