head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
Weighty corridor shooting through scripted encounters with light loadout choice.

Execution · Practiced Mastery
Alt-history FPS pivoting between brutal combat and quiet moments.
Killzone leans Execution (Practiced Mastery); Wolfenstein: The New Order 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.
Killzone
Heavy gunplay still rewards aim and positioning
Wolfenstein: The New Order
Dual-wield shooting and movement demand inputs.
Killzone leans a little harder on reads, though the gap is small.
Killzone
Campaign Helghast follow scripts; servers are long dead
Wolfenstein: The New Order
Nazi AI scripted, predictable.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Killzone
Encounters are fixed and replayable
Wolfenstein: The New Order
Almost no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Killzone
Character choice and route knowledge solve each level
Wolfenstein: The New Order
Perks and weapon upgrades light.
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.