head to head
vs
Head Over HeelsvsUndertale
Head Over Heels leans Optimization (Practiced Mastery); Undertale leans Optimization (Pure Optimization).
Head Over HeelsUndertale
Axis by axis
Execution5 vs 4
Head Over Heels leans harder on execution: Isometric jumps are finicky but secondary to planning
Reads0 vs 1
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.