Building comparison
head to head
Killzone 2vsQuake
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.
Killzone 2
Execution · Pure Mechanics
A heavyweight sci-fi FPS pitting ISA soldiers against the Helghast with famously weighty gunfeel.
Quake
Execution · Pure Mechanics
The original twitch FPS - movement tech and rockets define skill.
Killzone 2 leans Execution (Pure Mechanics); Quake leans Execution (Pure Mechanics).
Killzone 2Quake
Axis by axis
Execution8 vs 9
Quake leans a little harder on execution, though the gap is small.
Killzone 2
Weighty gunplay punishes imprecise aim hard
Quake
Rocket aim and movement tech ceiling massive.
Reads4 vs 3
Killzone 2 leans a little harder on reads, though the gap is small.
Killzone 2
Multiplayer opponents adapt; campaign AI doesn't
Quake
PvP duels involve real opponent modeling.
Variance2 vs 1
Killzone 2 leans a little harder on variance, though the gap is small.
Killzone 2
Modest spawn and objective rotation noise
Quake
Item timing deterministic once learned.
Optimization4 vs 4
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Killzone 2
Class unlocks and map control are learnable
Quake
Map control and item routes solvable.
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.