head to head
vs
Guitar Hero IIvsVVVVVV
Guitar Hero II leans Execution (Pure Mechanics); VVVVVV leans Execution (Pure Mechanics).
Guitar Hero IIVVVVVV
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 0
Even - both lean on variance about the same.
Optimization2 vs 3
VVVVVV leans harder on optimization: Routes are short and obvious; execution is everything
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.