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

Optimization · Practiced Mastery
Breezy open-world adventure romping through Greek myth puzzles and monsters.

Optimization · Practiced Mastery
BioWare's wuxia RPG mixing martial-arts combat with moral-path storytelling.
Immortals Fenyx Rising leans Optimization (Practiced Mastery); Jade Empire leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Immortals Fenyx Rising
Dodge timing and aerial combos
Jade Empire
Real-time martial combat with dodge timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Immortals Fenyx Rising
Mythic beasts follow fixed movesets
Jade Empire
Foes use fixed styles
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Immortals Fenyx Rising
Little randomness in the open world
Jade Empire
Authored RPG with set encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Immortals Fenyx Rising
Vault puzzles, gear builds, and stamina routing
Jade Empire
Style counters, stat builds, and dialogue paths
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.