Thanks Steve. That looks pretty accurate although it does not make a difference between the Base XLT and XLT Premium.
To the best of my knowledge, at least in '05 the XLT Premium added fog lights, step bars, five-spoke wheels, larger 255/70-16 tires, 4.10 axle, and full-length console.
The XLS and base XLT had smaller 235/70-16 tires and a 3.73 axle.
To the best of my knowledge, the only options available in '05 on the XLS were the bed extender and limited-slip axle.
I got a Base XLT in '05 because I did not want step bars. I would have saved a few bucks and got an XLS but it did not come with cruise, not was it an option.