head to head
vs
BirthvsUnpacking
Birth leans Optimization (Systems & Chaos); Unpacking leans Optimization (Pure Optimization).
BirthUnpacking
Axis by axis
Execution1 vs 1
Even - both lean on execution about the same.
Reads0 vs 0
Even - both lean on reads about the same.
Variance2 vs 1
Birth leans harder on variance: Puzzle contents are unknown until each scene is poked
Optimization4 vs 5
Unpacking leans harder on optimization: Understanding acceptable placement rules and story logic guides packing decisions
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.