head to head
vs
Audiosurf 2vsRock Band 2
Audiosurf 2 leans Execution (Pure Mechanics); Rock Band 2 leans Execution (Pure Mechanics).
Audiosurf 2Rock Band 2
Axis by axis
Execution7 vs 8
Rock Band 2 leans harder on execution: Guitar, drum, and vocal accuracy on expert charts
Reads1 vs 0
Audiosurf 2 leans harder on reads: no opponent, purely solo pattern execution
Variance2 vs 0
Audiosurf 2 leans harder on variance: song choice creates varied but fixed patterns
Optimization4 vs 4
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.