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
Throttle and counter-steer precision on loose surfaces against the clock.

Execution · Pure Mechanics
A light-gun rail shooter testing aim and reaction against scripted enemies.
Colin McRae: Dirt leans Execution (Pure Mechanics); Confidential Mission leans Execution (Pure Mechanics).
Confidential Mission leans a little harder on execution, though the gap is small.
Colin McRae: Dirt
Car control on loose surfaces is the entire test
Confidential Mission
Light-gun aim and fast reactions are the whole game
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt
Racing the clock or AI lines, nothing adapts
Confidential Mission
Enemies pop on scripts, not adaptive prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Colin McRae: Dirt
Surface grip and damage add mild run noise
Confidential Mission
Enemy appearance timing adds minor randomness
Colin McRae: Dirt leans a little harder on optimization, though the gap is small.
Colin McRae: Dirt
Setup tuning and corner-line knowledge underpin pace
Confidential Mission
Memorizing enemy positions rewards repeated play
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.