Im not asking for the decision to be made for me. Im looking for Pros and Cons of each?, whats better on one than the other?, is one easier on maintenance than the other? Do you prefer the racks one on or the other?, does one fit into the bed of your truck better than the other? Does something need improved on one or the other, or both!? Etc, etc, etc.
I've got the 500, i know that body style, i know the maintenance. I know nothing about the 550.
Compare and contrast them fellas!