head to head
vs
UndertalevsYakuza 4
Undertale leans Optimization (Pure Optimization); Yakuza 4 leans Optimization (Practiced Mastery).
UndertaleYakuza 4
Axis by axis
Execution4 vs 5
Yakuza 4 leans harder on execution: Four fighting styles each need modest timing chops.
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.