Plenty of Windjammer 3008 owners here that just love their trailers. Yes, the Jammers have aluminum studs. Looking at the specs on the Coachman the weights and measures are fairly close except the Carrying Capacity which is much higher on the Coachman (maybe higher rated axles or frame?). That unit also appears to have the spread tires, not sure how much effect that has. Have you walked thru both units to see fit and finish? Ask the dealer for a spec sheet on both to compare. The Coachman Vnose is new so not many owners that we have heard from yet. Should be more responses from the Jammer family here.
(OH - Old Car jumped in there just as I knew he would!)