head to head
vs
Guitar Hero: World TourvsRez
Guitar Hero: World Tour leans Execution (Pure Mechanics); Rez leans Execution (Pure Mechanics).
Guitar Hero: World TourRez
Axis by axis
Execution8 vs 7
Guitar Hero: World Tour leans harder on execution: Fret-and-strum accuracy on expert note charts
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 1
Rez leans harder on variance: Fixed rail paths; nothing is hidden after one run
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.