Hello Luc,
Well, the RS is clearly meant to be an All Star competitor, right down to the drain holes. But it paddles more like a Vapor that has added flat water speed. And that is exactly why I demoed one. I love the way that the Vapor paddles and handles, but I could do with a board that is a tad faster in flat conditions. I also demoed the 2018 14x26 Maliko at the same time, and that's a nice board to paddle too, and I was quite impressed with it. But the handling of the RS was just a little better on the turns, when against and wind and light chop, and maybe it was slightly faster going upwind.
If you like how the Vapor paddles then you should definitely try a RS if you can. I don't know yet how the RS handles in bigger chop or serious downwind, so I'll let you know when I get a chance, which will probably be in a week or two.
There's a fair bit of volume in the RS, with thick rails and a fairly boofy nose. The RS 14'0" x 26" Is 315L (weight is around 27 lbs). So there's a fair bit more volume in all areas compared to the same width Vapor (271L) but it is lighter. It looks a bit chunky sitting next to e.g. the relatively low volume (264L for the 14x26) Maliko. But it doesn't look or feel "boaty" when paddling it, and is certainly much less "boaty" than e.g. an All Star, which has a fair bit more volume still (the 14x26 AS is 353L). The RS still somehow feels more like a board than a boat IMO despite the dropped deck. Whereas I'd say that an All Star is more boat than board - although no doubt other opinions are available :)
Curiously, the Maliko I tried was noticeably heavier than the RS even though the RS is advertised as heavier than the Maliko... dunno what is going on there, but maybe bear it in mind if you are buying a Maliko. This page claims just 11kg for the 14x26 (
www.naishsurfing.com/wp-content/uploads/2017/08/2018SUP_Board_Spec_Sheet_Final.pdf) but the one I tried sure felt a lot heavier than that to me. However I didn't put it on scales, and the crappy handle might make it feel heavier than it is (whereas the RS has that glorious SIC handle that is the best in the business).
You could quite happily tour around on the RS, which is no doubt partly why there are bungees. I was pootling around on it in the river dreaming of casual summer day trips on an RS... (it is freezing cold, windy and rainy here at the moment). So it will be very nice for casual recreational paddling and fitness, not just racing.
I need to have many more hours of experience paddling the RS in a variety of conditions (especially in proper downwind) before I'd be comfortable claiming that it is definitely the most versatile board I've tried. But I can already say it's one of the well-mannered and relaxing boards to paddle in flat water and mild wind/chop. And as you can imagine from the fact that it has replaced the X series flat water boards, Mark clearly intends it to be used for racing flat water as well as beach races/downwind.
We'll see how it goes downwind - I've always thought that the biggest performance weakness of the All Star was downwind, so it will be interesting to see how they stack up.
In short, if you are interested in a "fast Vapor on the flat", then definitely try the RS. That's exactly what I was looking for too, and I'm going to get one now.
Hope this helps.