head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Pure Mechanics
Grinding deterministic tracks for the perfect line and the flawless run.

Execution · Pure Mechanics
Futuristic sequel to the Trials physics-bike series with FMX tricks and brutally precise tracks.
TrackMania 2: Stadium leans Execution (Pure Mechanics); Trials Fusion leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
TrackMania 2: Stadium
Perfect inputs ARE the game - hundredths decide leaderboards
Trials Fusion
Frame-tight balance and throttle inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
TrackMania 2: Stadium
Ghost racing - opponents never interact with your run
Trials Fusion
No adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
TrackMania 2: Stadium
Fully deterministic physics, identical track every attempt
Trials Fusion
Deterministic physics, known tracks
TrackMania 2: Stadium leans a little harder on optimization, though the gap is small.
TrackMania 2: Stadium
Finding the optimal racing line is half the hunt
Trials Fusion
Optimal lines and trick scoring are learnable
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.