head to head
vs
UndertalevsYakuza 6: The Song of Life
Undertale leans Optimization (Pure Optimization); Yakuza 6: The Song of Life leans Optimization (Practiced Mastery).
UndertaleYakuza 6: The Song of Life
Axis by axis
Execution4 vs 5
Yakuza 6: The Song of Life leans harder on execution: Simplified Dragon Engine combat keeps a light timing test.
Reads1 vs 1
Even - both lean on reads about the same.
Variance1 vs 1
Even - both lean on variance about the same.
Optimization7 vs 6
Undertale leans harder on optimization: Learning fixed boss patterns and mercy routes wins
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.