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 · Practiced Mastery
Precise rally car control over stages that reward memorisation and tuning.

Execution · Practiced Mastery
The current entry in the officially licensed Formula 1 racing simulation series.
Dirt 3 leans Execution (Practiced Mastery); F1 25 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.
Dirt 3
Car control on loose surfaces is a high physical ceiling
F1 25
precise braking, throttle, and racing lines
F1 25 leans a little harder on reads, though the gap is small.
Dirt 3
Racing the clock or scripted AI, nobody adapts
F1 25
minor multiplayer positioning reads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 3
Surface conditions and minor physics noise per run
F1 25
weather and safety-car randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 3
Stage knowledge and setup tuning reward study
F1 25
strategy, tire, and setup optimization
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.