I would suspect you will hardly even notice a change in either noise or fuel consumption.
I have XDA Energy's on my coach and don't hear anything more than road noise, which you are going to get with any tire.
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2007 Haulmark 3329DS, Freightliner Coronado Chassis, 515hp Detroit, Meritor Freedomline 12speed Autoshift, 10kw Generator, In-motion Satellite.
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