It seems to me that Crash games give the player some result much faster and the deposit is spent much faster than in Slot games.
Also in Crash games the player decides when to stop, so we can say that something depends on him, unlike slot games, where you just need to press one button. Or is it even possible to set it to be pressed automatically.
Although in Crash games it can also be said that nothing is decided, because the player does not have any information to understand what his chances of winning are.