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

Execution · Practiced Mastery
Robot-dinosaur hunting that rewards weak-point study and ranged precision.

Execution · Practiced Mastery
Learning scripted mission layouts and executing aim and stealth under pressure.
Horizon Zero Dawn leans Execution (Practiced Mastery); Syphon Filter 3 leans Execution (Practiced Mastery).
Syphon Filter 3 leans a little harder on execution, though the gap is small.
Horizon Zero Dawn
Bow aiming and dodge timing matter.
Syphon Filter 3
Aim, taser timing and stealth movement carry encounters
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Zero Dawn
Machines follow fixed patterns, not adapting.
Syphon Filter 3
Enemies run fixed scripts, never model the player
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Zero Dawn
Some loot and patrol randomness.
Syphon Filter 3
Enemy placements are scripted-but-unknown on first runs
Syphon Filter 3 leans a little harder on optimization, though the gap is small.
Horizon Zero Dawn
Weak points, traps, builds fully solvable.
Syphon Filter 3
Routes, gadget use and mission layouts are fully learnable
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.