Nothing is "safer than the other" when it comes to user data. After years here, I think you have seen instances where older exchanges have had their user data leaked. You Remember the Binance Exchange data leak?
Binance has been considered the Biggest exchanges for some years now and with all the money and developers they have and pay, somehow the data still leaked. The same applies to the casinos. It doesn't matter if it's old or new, the user data is never 100% safe.