head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
Arcade brawler execution against fully memorisable enemy waves.

Execution · Pure Mechanics
A hand-animated revival of Rayman's 2D platforming.
Alien vs. Predator leans Execution (Pure Mechanics); Rayman Origins 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.
Alien vs. Predator
Crowd control, spacing and combo timing carry the arcade brawling
Rayman Origins
Fluid run-jump-glide chains
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator
Xenomorph waves are scripted patterns, not minds
Rayman Origins
Scripted enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator
Enemy spawns are fixed and memorable
Rayman Origins
Deterministic levels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien vs. Predator
Learning spawn layouts and character tools maximises one-credit runs
Rayman Origins
Lum routing for perfection
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.