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

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

Execution · Twitch Chaos
Kart racing where driving skill fights a steady drizzle of random gag items.
Aliens vs. Predator 2 leans Execution (Pure Mechanics); Looney Tunes: Space Race leans Execution (Twitch Chaos).
Aliens vs. Predator 2 leans a little harder on execution, though the gap is small.
Aliens vs. Predator 2
Wall-crawling aliens and panicked marines test raw aim
Looney Tunes: Space Race
Racing lines and drift control still decide most finishes
Aliens vs. Predator 2 leans a little harder on reads, though the gap is small.
Aliens vs. Predator 2
Cross-species multiplayer rewards outguessing human opponents
Looney Tunes: Space Race
Light gag-timing duels against human racers
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
Looney Tunes: Space Race
Random gag pickups scramble race outcomes
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
Looney Tunes: Space Race
Shortcut and track knowledge compound every lap
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.