Of course being a unique gambling casino would be better than a copycat, no doubt about that, but in reality it's practically impossible. The established model of sports betting, for example, is so good, so convenient for bettors, that with making something entirely new you are risking to be left without customers. Let alone slots that are rented from software providers. They are all the same. How can you be unique in that department? Yes, some gambling sites have their own slots, but it's only one or two among many hundreds of leased ones, and that’s because it is very costly to create a good slot.
That's why I think it is enough to be a bit different, in a good way, to win the competition these days.
True, it will require a huge upfront investment to try to differentiate from the other casinos without any guarantee that this will bring any clients, I think it is better for casinos owners to concentrate on the execution of the casino itself and try to be slightly better or at least on par with what we already see with successful casinos, for example some casinos grow so rapidly their customer support can be very slow to answer to your inquires, if you could make your customer support to become top notch in the industry that could be more than enough to get a lot of clients.