The difference between Metaverse and Mirrorverse is the same as between VR and AR. In mirrorverse, you would be able to use your NFTs as AR objects in the real world.
Jadu aims to build an AR game world around NFTs of popular communities. In the current beta version, you can place NFT avatars and play around with them. In the experimental section, you can use one of the provided Deadfellaz avatars but you can also connect a wallet to use your own. The project also sells NFT hoverboards and jetpacks for your AR characters to use.