It depends on what you're looking for. If it's just a night to crash before a 6 AM flight, I'd choose the Sheraton, as it's practically on the airport tarmac. If you want to be able to walk around a bit, I'd choose the Residence Inn, as there's some restaurants and the like in the area. Of course, you'll also get a bigger room at the RI. Neither hotel is anything spectacular or bad in of itself though, so I'd choose on location and room size.