How could I have not answered your question? TPC and TPCII are the same, only one is improved over the original. So, if the original kicked ass at converting and compressing 32-bit files into 16-bit files and keeping a shitload of the quality intact...then TPCII could only be better at doing that. Same thing with any update for any peice of software. When you upgrade from version 1.0 to 1.3....there's not much of a difference, maybe it's just easier to do one simple task, or maybe they changed how something looks...or whatever they noticed on certain machines this function doesn't work as smoothly so they fixed it. Tiny little things to perfect it. Same case here.
I'm really unable to see how any of this is still missing the mark of your question. One is the original, one is an improved version. They both do the same exact thing. Use your imagination. Jesus.
~006