Start two editors, in one open rgirls and in second open rgirlsx, choose the same girl in both and compare their data, if it's the same it's not an editor issue. I just tried that on few girls and data from rgirlsx is the same as data for rgirls. Editor is just front end to make creating and editing these files easier, it has no direct effect on how girls, random girls or items are going to behave in game.
If you have this issue of different stats for girls that are loaded from rgirls, and different stats for those that are from rgirlsx you should report that in game bug thread.