Our Suites came equipped with a residential Whirlpool fridge. We LOVE it, we like the size and the extra storage of food it affords us. Your sales guy is pretty close to right on the battery time. We have 2 6 volt batteries and a 1,000 watt inverter that handles the fridge quit well.
On a side note (not to hi-jack this thread) I installed 3 100 watt solar panels on the roof with a MPPT charger, in sunny conditions I don't "need" a generator at all. Too many cloudy days in a row and all bets are off especially here in Wisconsin, :B
I would say go for the residential, it cools faster, holds more and "looks" nicer! :C
Dan