Is there any difference in water pressure with a 1/4 turn valve or a 2 1/2 turn valve

Shouldn't be... but if anything you would have slightly better flow through a 1/4 turn. As the path is more direct.

I agree with the previous post: there should no difference in pressure and not so noticeable difference in water flow when both valves are fully open.

1/4 turn are less restricting(volume wise), but either will work just fine in most cases. I prefer the 1/4 turn(ball type valve) over the numerous turn(glove valve type), as they tend to last longer.

I agree with all experts above, Thanks.

John