heya, so welcome back. I can explain the differences for ya and it's not really a straight answer so bear with me.
so the story itself is done. that version is v0.21.4. that's a continuation of the original version that you played before. that version has the ending. v0.21.4 will also no longer be updated.
the revamp starts back from the beginning and is me using everything that i've learned to fix the early parts of the game that read, looked, and played like crap. that version has updated graphics, sound effects, music, better writing, and fixes a lot of problems from the old version. the revamp version is the current version that i'm working on but right now it's only chapter 1. the early parts of the game need a lot of work so the updates on the revamp are kinda slow with less content than what people are used to expecting from these game updates. however, it will progressively get faster because i'll have less stuff to do as the game progresses. eventually, the revamp version will replace the old version of the game and will be the finished product. the revamp will have the same ending as the other version