The biggest advantage of the 2 way Jandy valve is that it is repairable without removing the body from the plumbing. A ball valve is not repairable but it is replaceable if you cut it out of the PVC plumbing and purchase a new one which also requires you to replace or modify your plumbing to accommodate it. the upfront extra cost of a Jandy 2 way valve is worth it considering the hassles you will have in the future with a simple ball valve.
I used ball valves until I had one stick that required a complete redo on my plumbing after a year. Now I have Hayward and they came with unions so if one fails it’s easy to swap. I even bought a couple spares