head to head
vs
Rock Band 2vsSuper Mario World
Rock Band 2 leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Rock Band 2Super Mario World
Axis by axis
Execution8 vs 7
Rock Band 2 leans harder on execution: Guitar, drum, and vocal accuracy on expert charts
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 1
Super Mario World leans harder on variance: Levels are fixed; nothing hidden survives one playthrough
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.