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

Execution · Pure Mechanics
A snowboarding game testing trick execution and run routing for high scores.

Execution · Practiced Mastery
Simulation driving precision underpinned by setup tuning and race strategy.
Amped 3 leans Execution (Pure Mechanics); Project CARS 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.
Amped 3
Trick input timing and landing balance are the core test
Project CARS
Braking points and wheel control at the sim limit
Project CARS leans a little harder on reads, though the gap is small.
Amped 3
Solo riding with no adaptive opponent
Project CARS
Online racecraft against humans adds light positional prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Amped 3
Fixed terrain; minor event variation
Project CARS
Dynamic weather injects some session randomness
Project CARS leans a little harder on optimization, though the gap is small.
Amped 3
Line choice and trick chaining maximize scores
Project CARS
Setup tuning and pit strategy reward deep study
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.