Wow! That's a great line-up!
The Deluxe WW is huge in comparison to the others. I do think, just from the pictures, that she does look like a real improvement. The costume looks stunning (and I repeat, is what the Dc Direct 13" WW's costume should look like). I still am not sure I see any differences in the two bodies besides size though, just from looking at the pictures, although the Wonder Panties do seem to have a better fit on the deluxe doll. Eh, and the thighs are thicker too. OK, I see the differences in build now
The downside is that the Deluxe figures start a whole new line. But they are great if you just want that one character. I wonder if we will see a Batgirl, maybe in the black outfit. The Tonner Deluxe Supergirl has a great face, but I hate the costume.