i’d say ghost was reworked, as in “played differently”. the airy quality and sparseness of the song itself is replaced with much more nasty rock-riffing from Trey, gone are the loops and they definately sped it up a little. the jams also tend to be much more on the rocking side, i think reflecting the different way of playing the song.
it’s just a testament to how fascinating Phish’s music is. it seems any song could just keep subtly changing and evolving, especially thier latter-half of the 90’s stuff.