No. The mesh is only part of it. The proportions are different and she's taller than default Roxie. 

This is why I was pissed when Rex and Roxie (and thus their clothing) released with no animated joint centers. But Teyon explained to me why that was the case, I just don't remember what the explanation was. 

I still have to figure out how to inject AJCs and WMs.

But, if you mean the mesh being altered, and her keeping her default shape then yes, the same rig could be used. But every morph would still need to be rebuilt.

But if I were to do it then the entire figure would be redesigned, and current default roxie could be an injection pose, for those who like her.

 

~Shane