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
Co-op horde shooting that tests aim plus class-build and choke-point planning.

Execution · Practiced Mastery
Robot-dinosaur hunting that rewards weak-point study and ranged precision.
Aliens: Fireteam Elite leans Execution (Practiced Mastery); Horizon Zero Dawn leans Execution (Practiced Mastery).
Aliens: Fireteam Elite leans a little harder on execution, though the gap is small.
Aliens: Fireteam Elite
Holding aim on swarming xenomorphs is the core demand
Horizon Zero Dawn
Bow aiming and dodge timing matter.
Horizon Zero Dawn leans a little harder on reads, though the gap is small.
Aliens: Fireteam Elite
Horde AI rushes on scripts, never modelling the squad
Horizon Zero Dawn
Machines follow fixed patterns, not adapting.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens: Fireteam Elite
Spawn mixes vary mildly between runs
Horizon Zero Dawn
Some loot and patrol randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens: Fireteam Elite
Class builds, perk synergies and choke-point setups are solvable
Horizon Zero Dawn
Weak points, traps, builds fully solvable.
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.