We bought a new '12 3950. I suspect there is NOT much difference. IMHO, your tow vehicle is really important. I have an F-450 DRW, CC, 4X4 w/ 3.88 gears, tuned, full delete. While is has plenty of HP, we only run 60 mph. Better mileage....but IF I want any black smoke, watch out
)) Our only issue, compared to our Raptors, is you can NOT even open the refrig door without putting the rooms out. My plans are to isolate the master bed hydraulics, so when we stop for lunch, only the other two go out. Feel free to call: 970-485-2144. I have modified ours a lot
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