The difference with Pragmatic Play is that they need the same average number of spins both in FUN play and in real money mode to trigger the bonus,that is what gets me mad from Play n Go.
I do have not enough experience with Pragmatic Play since I have no way to pay with without a use of VPN but with regards to Play n Go, I can say that there is no way we can prove that the demo game has a higher RTP than the real money game. In my experience, I often trigger the bonus round with 50 to 100 spins but will make it harder as the game session gets longer. Though, I can say that luck still has an effect on the chance of triggering a bonus, and possibly the casino we are playing. recently I find it hard to get in a bonus round on stake while I find it easier to trigger the bonus round on livecasino, maybe because I have been playing in stake for a longer time with the same set of slots game. It is somehow debatable but I am just stating something that is according to my personal experience.