head to head
vs
UndertalevsZup! 2
Undertale leans Optimization (Pure Optimization); Zup! 2 leans Optimization (Pure Optimization).
UndertaleZup! 2
Axis by axis
Execution4 vs 3
Undertale leans harder on execution: Bullet-hell dodging in scripted patterns
Reads1 vs 0
Undertale leans harder on reads: NPCs follow fixed dialogue trees, not adaptive
Variance1 vs 1
Even - both lean on variance about the same.
Optimization7 vs 7
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.