When The Borgata opened a few years ago it vastly changed the landscape of AC. It was the newest, most lavish casino to open there in years and seemingly had the freshest marketing ideas. As when all new casinos open it draws players from all of the existing properties, in addition to creating new players & growing the market. If the new property provides a better experience than the previous ones, they retain the bulk of the players, otherwise they return to their favorite casino after checking out the new one. This is what happened at The Bortgata. It was the new player in the market & quickly became the largest grossing property in AC & has retained that status.
Only time will tell whether or not The Crown will be able to do the same but they have the management experience & are ready to provide a 6 star experience to their guests.