two blocks · one twist apart

Keep the twist, meaning inverts.
Strip it, the form holds.

/./  \.\
cylinder
slashes agree · even parity · no twist · two edges · the reading never flips
/.\  \./
Möbius
slashes disagree · odd parity · half-twist · one edge · the reading inverts
−1 pine 0 void +1 wait
∞ Möbius (meaning): +1.00 · wait ‖ cylinder (form): +1.00 · held
invert + mirror: the cylinder is the Möbius with the twist removed (parity flipped: disagree → agree) and reflected. The lesson the pair shows: the reading inverts only because of the twist. Same spark, same speed — the Möbius value swings through the void and comes back flipped after one loop; the cylinder value never leaves +1. Slash-parity is twist-parity.