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 control with item RNG swinging family-friendly races.
Aliens vs. Predator 2 leans Execution (Pure Mechanics); F1 Race Stars 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
F1 Race Stars
Kart handling and boost timing decide clean laps
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
F1 Race Stars
Human racers feint and time item attacks in multiplayer
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
F1 Race Stars
Item rolls swing positions like any kart racer
Aliens vs. Predator 2 leans a little harder on optimization, though the gap is small.
Aliens vs. Predator 2
Species matchup knowledge and map control are learnable
F1 Race Stars
Track shortcuts and KERS timing are learnable edges
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.