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
An asymmetric FPS with three interlocking campaigns as marine, alien, and predator on the same colony.

Execution · Pure Mechanics
Arcade racing with Mario Kart-style power-ups bolted onto licensed cars.
Aliens vs. Predator 2 leans Execution (Pure Mechanics); Blur 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 2
Wall-crawling aliens and panicked marines test raw aim
Blur
Racing lines and dodging shots demand car control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens vs. Predator 2
Cross-species multiplayer rewards outguessing human opponents
Blur
Human racers bait and time power-ups against you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens vs. Predator 2
Motion tracker pings and dark corridors conceal threats
Blur
Power-up pickups and incoming attacks add chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Aliens vs. Predator 2
Species matchup knowledge and map control are learnable
Blur
Track knowledge and pickup routes are learnable
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.