head to head
vs
Bust a GroovevsGuitar Hero: World Tour
Bust a Groove leans Execution (Pure Mechanics); Guitar Hero: World Tour leans Execution (Pure Mechanics).
Bust a GrooveGuitar Hero: World Tour
Axis by axis
Execution7 vs 8
Guitar Hero: World Tour leans harder on execution: Fret-and-strum accuracy on expert note charts
Reads2 vs 0
Bust a Groove leans harder on reads: Attack timing against the rival adds light prediction
Variance1 vs 0
Bust a Groove leans harder on variance: Songs and inputs are fixed
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.