head to head
vs
Head Over HeelsvsHelltaker
Head Over Heels leans Optimization (Practiced Mastery); Helltaker leans Optimization (Pure Optimization).
Head Over HeelsHelltaker
Axis by axis
Execution5 vs 1
Head Over Heels leans harder on execution: Isometric jumps are finicky but secondary to planning
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 0
Head Over Heels leans harder on variance: Rooms are fixed, unknown only until entered
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.