not so sure if I want to defend pablofsi since I don't share lots of opinions that he had, but he never said the XIII was using the netcode from supercade/2df.
He said that SNKP hired Damdai to help them with the netcode
Reading SRK, is seems that SNKP is forced to use the same netcode that had always used from some strange reason, so maybe they worked with and made it better