Great replies everyone, thanks, the decision was made, I bought one of each... Haha, but I am selling the smaller (NRS) basically because the hyside I bought is a foot longer and wider and fits my double rail frame much better.
I do feel that when compared side by side the hyside has more protection under the tubes, but the NRS has more under the floor. NRS comes with twice as many D-rings as well. The valve location on the hysides is curious and makes me wonder if it will be right where people sit or the frame rests, I still need to get it out on the water. NRS puts its valves in the front and back so they are always out of the way.
As for toughness though, I think both are equal in the end, the hysides are a bit lighter and may slide over rocks easier, but the NRS boats have extra coating all over the bottom and half way up the sides. Had my NRS been an E-140 rather than a 130 I would have kept it probably. But I like my DRE frame much better than the NRS frame I can fit on the E130.
Thats a whole other topic though, DRE frames rock, but the attachment system (LoPro) from NRS is way easier to use and move while on the river, plus it seems more stout... I wish DRE used something like that rather then the set screws, they worry me, I like knowing things are pinned, or that I can remove them without taking the whole frame apart, but I have had no problems yet either with the DRE, just like when things are way over built and burly beyond their needs.
Thanks everyone! More comments are always welcome, who knows one day maybe I'll need to sell the hyside for an E-140...