lol you can tell a lot of these head sculpts use the game models. All those 3d cgi fanarts you see on the FFVII fan pages do too and I'm surprised a lot of them don't just mention . They've been using the files that were ripped on certain sites and sculpting their own hair and texturing them themselves since texture maps from games are actually 2d images that can't be printed out.
I really like the head sculpts on the Play Arts, but the bodies and paint always look so cheap next to my other collectibles.
As for the Xceed 1/4 diorama that includes Tifa, Cloud and Aerith, they seem to be a company that's more made by fans, for the fans. They did that Chrono Trigger 1/6 statue at a really good price and an amazing 1/4 Goku vs Vegeta at a really good price too (people started receiving them, I think).
https://www.youtube.com/watch?v=KPuCKGRTjTM&ab_channel=DBShopChannel&disable_polymer=true
I ended up order the trio and Pink Pink Studios Cloud.