head to head
vs
Guitar Hero IIvsRhythm Doctor
Guitar Hero II leans Execution (Pure Mechanics); Rhythm Doctor leans Execution (Pure Mechanics).
Guitar Hero IIRhythm Doctor
Axis by axis
Execution9 vs 9
Even - both lean on execution about the same.
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 1
Rhythm Doctor leans harder on variance: Levels are fixed; only visual gimmicks obscure timing
Optimization2 vs 3
Rhythm Doctor leans harder on optimization: Learning each level's rhythm tricks is light routing
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.