Yes, I mean that they are different and you can't compare them.Isn't Nintendont a GameCube backup loader ?
If you want to play Wii U backups: Loadiine.
If you want to play GC/Wii backups or emulate GBA/SNES/NES: Nintendont, Dios Mios and many others, and emulators in vWii (Wii Menu)