head to head
Killzone 3 asks more than Outlaw, and the gap is optimization.

Execution · Pure Mechanics
Heavy first-person gunplay testing aim, with positional prediction in multiplayer.

Execution · Pure Mechanics
An early top-down shootout game testing precise aim against a human opponent.
Killzone 3 leans Execution (Pure Mechanics); Outlaw leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Killzone 3
Weighty gunplay still demands aim and recoil control
Outlaw
precise aiming and movement in duels
Killzone 3 leans a little harder on reads, though the gap is small.
Killzone 3
Multiplayer opponents flank and bait; campaign AI is scripted
Outlaw
human opponents adapt dueling tactics
Killzone 3 leans a little harder on variance, though the gap is small.
Killzone 3
Spawns and spread inject limited randomness
Outlaw
minimal randomness in shootouts
Killzone 3 leans clearly harder on optimization.
Killzone 3
Map control, loadouts and class roles structure multiplayer
Outlaw
minimal system depth
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.