One kind is Transformations Pack and another is UX Pack.
WindowsX team typically develops two kinds of theme packs. Transformations or UX Pack? Which should you Install? You can just consider these packs as powerful Mac OS X Yosemite Themes for Windows. Your Windows OS will continue to work as the way it worked before. Thus you will feel very near user experience that on Apple’s OS. From your Windows side, it will resemble Apple’s iOS 8 and OS X Yosemite graphics.
