You can directly inject many of V3's and SP's morphs on Laura, but I suspect they are using Morph Manager to transfer them. That seems to work better.

Laura's head is large for her body, since she's a child figure, but a lot of people think DAZ makes heads too small, so that's not really a problem. When she's fully clothed, Laura's head doesn't look that big, and you can always scale it a bit if you want.

Anyway, it's worth a try, the next time DAZ has one of their 50% off sales. If you don't like it, you can always return it. :-)

I wonder if someone would consider re-doing Jessi to have the Girl's rigging? Now that might be interesting.

Why would low-res Jess look blocky? From what I could see, she looked about the same as high-res Jess, and I would think Poser's smoothing would take care of it anyway. I do find James and Jessi look a bit blocky anyway, but not as a result of their resolution. Rather, it looks to me like an artistic choice. Low-res James and Jessi have the same number of polys as V2 and M2, so I would think they'd look pretty good.