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

Execution · Practiced Mastery
Capcom's arcade brawler pits Predators and marines against scripted xenomorph hordes.

Execution · Practiced Mastery
Arcade western shooter narrated as a bounty hunter's tall tale.
Alien vs. Predator (1994) leans Execution (Practiced Mastery); Call of Juarez: Gunslinger leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator (1994)
Crowd control, dashes, and charge attacks need tight hands.
Call of Juarez: Gunslinger
Quick-draw duels and combo shooting demand precision
Alien vs. Predator (1994) leans a little harder on reads, though the gap is small.
Alien vs. Predator (1994)
Xenomorph waves are scripted patterns, not adaptation.
Call of Juarez: Gunslinger
Enemies are scripted gallery targets
Alien vs. Predator (1994) leans a little harder on variance, though the gap is small.
Alien vs. Predator (1994)
Minor enemy spawn and drop randomness.
Call of Juarez: Gunslinger
Minor enemy placement surprises first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator (1994)
Character tech and wave-by-wave routing are fully learnable.
Call of Juarez: Gunslinger
Score routes, skill trees, duel timing knowledge
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.