What does your budget allow?
I've Had both in my Kachina. Been a while since I had the manual Jetovator but it was more accurate with the slot stops. I now have a Hydro place diverter that I have learned to enjoy. Its fairly fast. Not as fast as manual but you can usually find the sweet spot quickly.
If you go hydraulic try to upgrade to s.s braided lines. the plastic ones seam to last a couple of years and thats it. Then you end up with leaks and breaks.
Also if you decide to go hydraulic get a switch on the steering wheel and an extra diode for the switch. Keeps your hands on the wheel.
Both are acceptable. You'll like either one.
I here Rex and HTP have good prices. Both offer advice here.