Hi & welcome,
A 5W is much more stable when towing, especially in crosswinds. Much less likely to sway. Floor plans tend to be different as well, though there are few floor plans that are possible in one and not in the other. A 5W lends itself nicely to front bedroom & bath, so many are designed that way. And obviously the 5W is a two-level floor plan - their will be a few steps up in the front.