Vicki to P4 is only called that because she can wear P4 clothes as her body has the same scaling and shape. But it's a different mesh so morphs won't work. The low res V2 can accept the same pose and face files because her morphs have the same NAMES as the regular Vicki 2 but that's where the similarity ends. Because it's low poly the mesh is different so trying to use .obj morphs is useless. However, since many people distribute pose and face files for their characters anyway everything works out and because of the plethora of morphs she has you can shape her any which way you want yourself. Low poly does not necessarily mean she's inferior, I find with a great texture she can be just as good as the regular Vicki for closeups and does not put a strain on your machine if you intend to use her in settings with other characters and clothes. I got her when Daz gave Vicki 1 lo res because she was such a bargain and have been using her ever since. Plus I have a dinky pc that nees upgrading badly so she's saved me! If the price though has gone up and it's close to the regular Vicki 2 or the upgrade (if you have Vicki 1) then go with the regular Vicki 2.