head to head
vs
UndertalevsYakuza 5
Undertale leans Optimization (Pure Optimization); Yakuza 5 leans Optimization (Practiced Mastery).
UndertaleYakuza 5
Axis by axis
Execution4 vs 5
Yakuza 5 leans harder on execution: Brawls, racing and rhythm segments need decent hands.
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.