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

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

Execution · Practiced Mastery
The original Souls game: scripted boss patterns you solve with builds, routes and disciplined execution.
Alien vs. Predator (1994) leans Execution (Practiced Mastery); Demon's Souls 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.
Demon's Souls
Stamina-timed dodges and parries punish sloppy hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator (1994)
Xenomorph waves are scripted patterns, not adaptation.
Demon's Souls
Invasions exist but bosses are scripted patterns.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator (1994)
Minor enemy spawn and drop randomness.
Demon's Souls
World tendency and upgrade drops add mild noise.
Demon's Souls leans a little harder on optimization, though the gap is small.
Alien vs. Predator (1994)
Character tech and wave-by-wave routing are fully learnable.
Demon's Souls
Builds, routes and learned movesets are 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.