Funny thing, David, that people are parsing costs to justify their choice of Private or Juta but in most cases (like you point out here) that a difference might only be $5. I have used Juta many times and, when I am traveling solo, it sometimes makes a bigger difference but not for couples or larger groups.
One of the first early lessons learned in Jamaica was to get contact information for a lot of drivers and then use the ones who give me the best experience for the dollar and have a few choices when the others were previously chartered.
Linston is on the top of my list when I need a driver!
Having a driver available that you like and trust is very important to a great vacation.
Big Up!
Peace and Guidance