head to head
Hatsune Miku: Colorful Stage!vsRock Band 2
Hatsune Miku: Colorful Stage! leans Execution (Pure Mechanics); Rock Band 2 leans Execution (Pure Mechanics).
Hatsune Miku: Colorful Stage!Rock Band 2
Axis by axis
Execution8 vs 8
Even - both lean on execution about the same.
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 0
Hatsune Miku: Colorful Stage! leans harder on variance: Gacha pulls affect score multipliers, not play skill
Optimization3 vs 4
Rock Band 2 leans harder on optimization: Overdrive activation paths decide leaderboard scores
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

