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

Execution · Pure Mechanics
Arcade hockey reflexes with light shot-angle guessing against human opponents.

Execution · Pure Mechanics
A PS4-era Killzone where a Shadow Marshal and his OWL drone fight through a divided Helghast city.
Blades of Steel leans Execution (Pure Mechanics); 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.
Blades of Steel
Skating, passing and shot timing decide every rush
Killzone Shadow Fall
Standard FPS aim and movement ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blades of Steel
Versus a human, goalie duels become guessing games
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.
Blades of Steel
Fights and bounces add small arcade chaos
Killzone Shadow Fall
Some open level routes and spawn noise
Killzone Shadow Fall leans a little harder on optimization, though the gap is small.
Blades of Steel
Angle exploits on the goalie are quickly mapped
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.