Congrats on the new 5er!!! We looked at those before we ordered our last 5er.
I think that different lines just use different materials that help them get to their price point. Not trying to ruffle any feathers, but it seems that the higher gloss is on some of the upper mid level on up classes of rvs and of course the higher end will probably have full body paint. With the non-glossy on the more budget priced units.
It is may be slightly more difficult to maintain but not too much, and you will want to use a wax that doesn't leave a white residue, like Turtle Wax Ice, or similar.