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.

Optimization · Practiced Mastery
A PSP stealth-action side story following Altair's hunt for Templars on Cyprus.

Execution · Practiced Mastery
Robot-dinosaur hunting that rewards weak-point study and ranged precision.
Assassin's Creed: Bloodlines leans Optimization (Practiced Mastery); Horizon Zero Dawn leans Execution (Practiced Mastery).
Horizon Zero Dawn leans a little harder on execution, though the gap is small.
Assassin's Creed: Bloodlines
Simplified PSP combat and climbing demand little precision
Horizon Zero Dawn
Bow aiming and dodge timing matter.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed: Bloodlines
Templar guards are entirely scripted
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.
Assassin's Creed: Bloodlines
Compact fixed maps leave few surprises
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.
Assassin's Creed: Bloodlines
Route knowledge and counter timing are quickly solved
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.