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

Execution · Practiced Mastery
A tense sci-fi shooter where asymmetric species combat rewards aim and positioning.

Execution · Pure Mechanics
Routine shooter aim through scripted cartel firefights.
Aliens vs. Predator leans Execution (Practiced Mastery); Call of Juarez: The Cartel 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.
Aliens vs. Predator
aim and melee timing across species
Call of Juarez: The Cartel
Standard FPS gunfights run on aim alone
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens vs. Predator
human opponents in multiplayer modes
Call of Juarez: The Cartel
Co-op secret objectives add mild teammate suspicion
Aliens vs. Predator leans a little harder on variance, though the gap is small.
Aliens vs. Predator
enemy spawns and drops vary
Call of Juarez: The Cartel
Enemy waves spawn identically each run
Aliens vs. Predator leans a little harder on optimization, though the gap is small.
Aliens vs. Predator
class abilities and routes solvable
Call of Juarez: The Cartel
Weapon levelling is a thin progression layer
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.