As others have said, no mileage earning on the Contour flight, and the seats are normal ERJ coach seats, but with extra legroom. There is no alcohol served onboard - not sure whether you can have them serve you your own minis. Whenever I check in at DCA for DCA-CLT-PAH, the system tries to charge a bag fee (even though I'm EXP), but the AA ticket agent always waives it. On the way home, Contour doesn't charge a first bag fee, so they check my bag through with no charge.

You can use your LF confirmation number to choose seats on Contour's website.