My issue might not be exactly cross-talk. I have the same clothing items for M4 and V4. If I load the M4 version and not use any morphs it is fine. But when I load the V4 version it comes in as the M4 version and vice versa not even using any morphs.

That is very likely a different Poser bug. See if the Geometry has the same name. (The same can happen with texture maps of the same name.) Poser can load the wrong object if the names are the same, even if the path is correctly specified. (You can check in your favorite text editor.)