This is the new home of Decibel Mastering.
Plans are being made. Rooms will be destroyed and reconstructed. Equipment will be bought and installed. Electricity will be rerouted. Sounds will travel through wires and air. Products that sound different will emerge. Those sounds will be louder, but they will also be better.
After all, that’s why you sent them right. They need to sound better, not just louder. If you wanted it to sound the same as when you last heard it, why would you have paid for mastering?