I have had Prevosts (Liberty) with no slides, single slide and double slides. The slides on a Prevost make a world of difference inside due to the large size of their slides. Fewer and fewer people want non slide coaches, so the resale value is much less. If you buy a non-slide, be sure you don't pay too much as when you want to sell it or trade it, you will get a good bit less than for a slide coach. I can't help you with Vantare as all of my Prevost experience has been with Liberty.