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

Execution · Practiced Mastery
An early golf sim about timing shots and managing the course.
Dirt 3 leans Execution (Practiced Mastery); Leaderboard leans Execution (Practiced Mastery).
Dirt 3 leans a little harder on execution, though the gap is small.
Dirt 3
Car control on loose surfaces is a high physical ceiling
Leaderboard
Timing the swing-meter precisely decides each shot
Leaderboard leans a little harder on reads, though the gap is small.
Dirt 3
Racing the clock or scripted AI, nobody adapts
Leaderboard
No adaptive opponent in this golf simulator
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
Leaderboard
Wind and lie add modest randomness to shots
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
Leaderboard
Club selection and course management reward planning
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.