Fischer XCD skis are very hard to find here in Eastern Canada. I have never seen any stores carrying them. I never had any S-Bounds before but I was lucky enough to find a brand new pair this fall. So I can't compare to older S98s but my guess is this must be the same ski except with different graphics and the addition of a built-in skin system.
The S-Bound 98 is pretty much Fischer's version of the 10th Mountain ski. Sidecut is 98-69-88. The old 10th Mtns were 99-68-84. In the real world, with both skis placed side by side and base-to-base, the sidecut is pretty much the same. The main difference is the flex. They both have a medium single camber but the flex on the S98 is much stiffer than on the 10th Mtn and the Epochs. Although Fischer claim all their S-Bounds skis have what they call "Nordic Rocker Camber", the tips are still much more stiffer than the 10th Mountains.
The S-98s are a bit heavier for the same size, about 100g more, thanks to the "Air Channel" ski core...

Despite the name Air Channel, I didn't have any problems mounting the bindings, all the screws were biting into something. I did feel some sort of "empty" layer right before hitting the P-Tex while drilling...
The sintered "Offtrack Crown" waxless pattern is very efficient. It climbs a bit better than the 10th Mtns, and the stiffer flex makes them better for kick and glide, (They have a bit too much sidecut to track very straight.) But on the other hand, the pattern drags slightly more on the downhill. They turn very easily, just like the Epochs. According to MikeK and his great scientific brain, he calculated the radius at 29.9m. I have to disagree here. According to my feeling, my eyes and my legs, I would say they're more in the 17-19m range.
The stiffer flex makes them a very nice all-around ski. They especially shine on the groomers or on a thin snow cover with a hard base. But if you ski only fresh powder in the BC like I do, the Epochs might be a better 'powder' ski than the S-98 because of its much softer flex and tips...
The main feature on the 2015-2016 model is obviously Fischer's "Easy Skin" system. I don't use skins anymore, even on the steeps. I'd rather zig-zag or side-step my way up or even take my skis off. I haven't even used my kickers for 2 years. But this is pretty cool. Other manufacturers have been doing this for some time, and while I'm not particularly crazy about it, I know this is a feature that people will really, really enjoy. The skins do what they are supposed to do. They are easy to put on and easy to take off, they are more convenient than kicker skins. The hole through the base of the ski is much bigger than the very tiny ones on the Asnes skis, but I don't think there could be any icing issue there. I made sure to wax the opening properly to prevent any kind of snow accumulation in there.
So that's it. It's a killer ski, very, very good construction. At 425$ USD with the skins and no bindings, it's not the cheapest ski around but it's totally worth it!