A higher pressure will work towards overcoming some line loss (resistance) and increase the GPM. The higher pressure will also reduce the drawdown on the tank. Lastly, depending on where on the pump curve you are, the higher pressure may reduce the GPM output of the pump. So, as you can see, without the details filled in, the difference may or may not be negligible.
A CSV would not care about the above details and give you consistently high pressure and stop most of the cycling.