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 · Competitive PvP
Cover-based shotgun duels testing movement execution and positional prediction in multiplayer.

Execution · Pure Mechanics
A PS4-era Killzone where a Shadow Marshal and his OWL drone fight through a divided Helghast city.
Gears of War: Ultimate Edition leans Execution (Competitive PvP); Killzone Shadow Fall 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.
Gears of War: Ultimate Edition
Wallbounce movement and gnasher duels demand real hands
Killzone Shadow Fall
Standard FPS aim and movement ceiling
Gears of War: Ultimate Edition leans a little harder on reads, though the gap is small.
Gears of War: Ultimate Edition
Multiplayer is constant positional mind-games around cover
Killzone Shadow Fall
PvP modes reward predicting human players
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Gears of War: Ultimate Edition
Weapon spawns timed and known; spread mildly random
Killzone Shadow Fall
Some open level routes and spawn noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Gears of War: Ultimate Edition
Map control and spawn timing knowledge structure matches
Killzone Shadow Fall
OWL drone usage and loadouts optimize cleanly
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.