Motor home chassis pro's and con's

I was looking at used units and found the FORDS much noisier in side the rig while driving, MUCH noisier!! I found one with WH and it is quiet and shifts smoothly which again I did not find the Fords did. The Fords I looked at were in Fleetwood Bounders, the one I bought is a Newmar Mountain AIre. The Fords were in coaches that were 2010 and newer. The Newmar is a 2003 but drives very nicely engine wise!