The version "3.75.3" is a specific, likely older, build of the Next Launcher. The "Premium APK" is a version that has been modified, typically by a third party, to unlock all paid features—in this case, enabling the "Full" paid version for free.
Many modern Android skins (One UI, OxygenOS, MIUI) now include robust theming engines that can achieve impressive visual effects without third-party launchers altogether. next launcher 3d shell better full v3 75 3 premium apk
Apply the icon pack of one theme while keeping the 3D dock and folders of another. The version "3