head to head
Guitar Hero IIvsTaiko no Tatsujin: The Drum Master!
Guitar Hero II leans Execution (Pure Mechanics); Taiko no Tatsujin: The Drum Master! leans Execution (Pure Mechanics).
Guitar Hero IITaiko no Tatsujin: The Drum Master!
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 1
Taiko no Tatsujin: The Drum Master! leans harder on variance: Note charts are fixed, no randomness
Optimization2 vs 3
Taiko no Tatsujin: The Drum Master! leans harder on optimization: Some scoring strategy but timing dominates
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

