head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
A tennis game testing swing timing, positioning, and anticipating returns.

Execution · Pure Mechanics
A PS4-era Killzone where a Shadow Marshal and his OWL drone fight through a divided Helghast city.
Anna Kournikova's Smash Court Tennis 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.
Anna Kournikova's Smash Court Tennis
Timing swings and positioning drive every rally
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.
Anna Kournikova's Smash Court Tennis
Versus play rewards anticipating opponent shots
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.
Anna Kournikova's Smash Court Tennis
Little randomness in ball physics
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.
Anna Kournikova's Smash Court Tennis
Shot selection and court positioning strategy
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.