I wish I would've realized that when I was at MCO this past summer. Got a Premium SUV from Enterprise (which is Alamo/National's parent company, they do share fleets), which turned out to be a 2015 GMC Terrain SLT-2 V6 FWD. It had 9k miles on it.
I assume they could give you any SUV with leather, a V6 engine, and some premium-quality stuff, like the GMC Terrain I had. For my family of 4, it served us well, and fit all of our luggage, which was a lot.