I'll be renting a convertible at LAX in a few weeks. Avis is about 5% more expensive than Budget for the same car. My gut feeling tells me that it's worth paying more because Avis has better service. On the other hand, I know they share a common fleet and probably the same staff, so it might be illusory. What about the shuttle wait times? I appreciate your advice.

I have both Preferred Plus and Fastbreak.