I don’t know that they put out a different schedule…but the main differences seem to be that the Castable V2 was optimized for a 50 micron layer thickness and is more opaque. Castable V1 is more transparent, and it seemed to have better castings at 25 micron.
I’ve been really impressed with the smoothness of Castable V2 at 50 micron, and don’t usually print at 25 unless it’s something very fine. If I’m making a model to make an RTV mold (cold mix), I use the Castable V2, even if I have no intention of direct casting from the model.