I don't know for sure, but it is kind of obvious isn't it? why else would they introduce the Delta that is exactly the same saw as the DeWalt with a different color?
If you look at the different divisions, Delta, Porter Cable, Black & Decker and DeWalt, You will find that DeWalt is their professional builders division. Delta and Porter Cable are their woodworking lines and B&D are their home handy man line. A scroll saw is not usually identified with professional builders. I think they are just moving the 788 to the woodworking line. Same saw, different color!