My advice is go to a dealer and drive an Axis and an ACE. There are also companies that rent them so you could take one on a week trip. The ACE is about a foot higher, 5" wider and (depending on the model a foot to several feet longer. The F-53 chassis had 22.5" wheels while the Axis has 16" wheels which means there is an extra step up into the ACE (something my wife did not like). The E-450 can be serviced by Jiffy Lube type places and normal FORD dealers while many smaller dealers will not touch an F-53. You are right that the price difference may not be that great and if the total square footage inside is most important, then the ACE is probably for you. We balanced that against the smaller exterior size, maneuverability and ease of finding a parking space and camp site and decided against upgrading from our 2014 Vegas to an ACE. We bought a new Axis instead. Others are very happy with their ACE or Hurricane.
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