A1000 had gender-reversed parallel and serial ports for whatever reason. All other models had standard Male and Female connectors AFAIK.
On the A1000, it was more than just a simple gender change. There was also a power pin that had been moved because a standard gender changer adapter didn't work and the user also risked damaging their Amiga if they tried to use a standard parallel printer cable and a standard gender changer. God, I miss my old A1000 though. Wish I had never sold it.