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
A Star Wars shooter that adds lightsabers and Force-power progression.

Execution · Practiced Mastery
The sequel-remake pairing Butcher Bay with a new stealth-action campaign aboard a mercenary ship.
Star Wars Jedi Knight: Dark Forces II leans Execution (Practiced Mastery); The Chronicles of Riddick: Assault on Dark Athena 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.
Star Wars Jedi Knight: Dark Forces II
Saber timing and platforming over huge levels
The Chronicles of Riddick: Assault on Dark Athena
Melee takedowns and gunplay demand reliable hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars Jedi Knight: Dark Forces II
Multiplayer duels existed; campaign AI is scripted
The Chronicles of Riddick: Assault on Dark Athena
Drone and guard behavior is fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars Jedi Knight: Dark Forces II
Sprawling levels surprise once then map out
The Chronicles of Riddick: Assault on Dark Athena
First-run uncertainty about patrols and drone placements
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars Jedi Knight: Dark Forces II
Force power allocation and routing reward planning
The Chronicles of Riddick: Assault on Dark Athena
Stealth routes and encounter solutions are learnable fixed content
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.
full breakdown
Star Wars Jedi Knight: Dark Forces II →
full breakdown
The Chronicles of Riddick: Assault on Dark Athena →