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
Punishing rally car control at the limit, supported by setup and stage knowledge.

Execution · Pure Mechanics
A pure time-attack arcade racer testing flawless car control on precision platform tracks.
Dirt Rally leans Execution (Pure Mechanics); Trackmania Turbo leans Execution (Pure Mechanics).
Trackmania Turbo leans a little harder on execution, though the gap is small.
Dirt Rally
Unforgiving car control on loose surfaces is the entire test
Trackmania Turbo
Platform-racer precision; every millisecond of input matters
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt Rally
Solo time trials against the clock, no adaptive rival
Trackmania Turbo
Ghost-only competition; no adaptive opponent
Dirt Rally leans a little harder on variance, though the gap is small.
Dirt Rally
Weather and surface degradation vary between stages
Trackmania Turbo
Deterministic tracks with no hidden randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt Rally
Pacenote interpretation, setup tuning and stage memorisation
Trackmania Turbo
Finding the fastest line and technique per track is fully solvable
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.