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
A rally racer where mastering precise car control against tricky terrain is everything.

Execution · Pure Mechanics
An arcade bike racer testing cornering execution across memorised circuits.
Colin McRae: Dirt 2 leans Execution (Pure Mechanics); Moto Racer 2 leans Execution (Pure Mechanics).
Colin McRae: Dirt 2 leans a little harder on execution, though the gap is small.
Colin McRae: Dirt 2
precise rally driving and braking required
Moto Racer 2
Cornering at speed across road and motocross demands clean inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt 2
no adaptive opponents, mostly time trials
Moto Racer 2
AI riders run fixed lines
Colin McRae: Dirt 2 leans a little harder on variance, though the gap is small.
Colin McRae: Dirt 2
weather and surface conditions vary
Moto Racer 2
Courses are static and learnable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt 2
car tuning and racing lines solvable
Moto Racer 2
Track memorisation and bike choice settle close races
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.