head to head
vs
Forza Motorsport 4vsTrackMania 2: Stadium
Forza Motorsport 4 leans Execution (Practiced Mastery); TrackMania 2: Stadium leans Execution (Pure Mechanics).
Forza Motorsport 4TrackMania 2: Stadium
Axis by axis
Execution8 vs 9
TrackMania 2: Stadium leans harder on execution: Perfect inputs ARE the game - hundredths decide leaderboards
Reads1 vs 0
Forza Motorsport 4 leans harder on reads: AI drivers don't meaningfully adapt
Variance1 vs 0
Forza Motorsport 4 leans harder on variance: minor race incident randomness
Optimization6 vs 6
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.