Again, those things are very depending on some others factors.. with a game with very low hit ratio and high volatility, you can lose consequently huge balance without winning a single bet, losing bet after bet till the end..
 but mathematically, the expectation is to lose your balance twice as fast playing a game with 96%RTP that playing with 98%PTP !

 Some casinos can provide games with very hight RTP and in the same time choose to not for some games or they simply do not provide them.. that is because of the payment structure, in some games you can get huge profits relatively quite quickly, so and then stop playing.. so and then if there is not lot of attendance on the game on the casino itself, the casino can choose to not endorse the benefit/risk ratio!