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
Gothic action adventure built on shifting between material and spectral realms to solve puzzles.
Immortals Fenyx Rising leans Optimization (Practiced Mastery); Legacy of Kain: Soul Reaver 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
Legacy of Kain: Soul Reaver
Combat and platforming are deliberate, moderately demanding
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
Legacy of Kain: Soul Reaver
Enemies and bosses fully scripted
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
Legacy of Kain: Soul Reaver
World fixed once explored
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
Legacy of Kain: Soul Reaver
Plane-shifting puzzles and route knowledge drive progress
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.