I know this is an old thread but with so few information out about both of these trailers someone (like me when I was searching) might find this via a search, so I'll add my two cents.
I looked hard at both of these trailers, side by side in the same lot. I went to look at the Nobo first, which is what drew me to the lot. I have a JL Wrangler Rubicon, which only has a 3500 lb towing capacity, so my options for trailers is extremely limited. Still, I wanted something that I could camp in with the wife and two small kids, and though that the Nobo 10.6 was a cool solution. It didn't have enough room to sleep all of us, but I was - like you - planning on throwing an RTT on it and letting the kids sleep up there. I'm sue they would have loved it.
Negatives Re: The NoBo
When I pawed around the Nobo I noticed a few things immediately. The first is the small size of the rear door. It's only a 50" opening, so that drastically limits what "toys" you can put in it if you plan on doing that. I've got a Yamaha Grizzly on 27" tires and it measures 52" at the tallest part of the handlebars. I also have a cargo carrier on the back for storing helmets and things, and that's right around 58". I would have to remove my carrier and air the tires way down every time I wanted to put the quad in the Nobo... that is, if I could even get it in. The rear entry ramp is STEEP since the trailer is so high off the ground and the ramp is so short. It was like a 40 degree angle to the ground when the trailer was sitting level. Since there's literally 0" to spare, forget riding the quad up in to the trailer. Not gonna happen. I'm sure 2 or 3 good sized guys could manually shove it up in there, but if you wanted to do it alone... not gonna happen. If you have a dirt bike, forget it... unless it's something really small like a Yamaha TW200. A WR450, for example, won't fit. Considering they market it as a "toy hauler" this was a big negative to me.
The second issue I had with it was the build quality. I immediately noticed when the sales person put the rear ramp down that the opening around the rear door were somewhat crushed (for lack of better term) where the mechanisms used to keep the door closed were located. I wish I would have taken a picture since it's kinda hard to explain what I mean, but because of this issue I questioned the water tightness of the door... especially over time, given the fact that the engineered tolerances weren't great at all. I also noticed that one of the handles that closes to lock the rear door in to place was broken and it was obvious that the handle was made of pot metal. All of the handles and closing mechanisms on the rear door and tip-out of the Flyer are steel and are very strong.
The third thing that I thought was a pretty big oversight was the floor storage compartment, which is in front of the "couch" when it's folded up. It's cool that the Nobo has floor storage, even though it's not very big, but the cover that covers it is not fixed in place or on any sort of hinges and is just supposed to lay over the storage compartment. When we were looking around in the trailer this cover was constantly sliding around and coming out of place and it seemed like an afterthought design-wise. I can see getting pissed/frustrated over time and either ditching the cover completely, losing it, or having to come up with some other solution.
Adding to the cheapness in build quality, there are two vents on the road-side of the 10.6 that are supposed to pop out. These are very cheap plastic and when the sales guy was showing them to us he was being overly cautious with them because I could tell he thought he was going to break them trying to pop them open. If you go and look at one, check these and the floor storage cover out and you'll see what I mean.
The under-side of the NoBo is "finished" with what can only be described as a plastic cardboard type of material. Think the same thing that political yard signs are made of. Because of this you can't see anything under the trailer when you look up at it from the bottom. If you tap on this material though you will see that it moves a lot and makes a lot of noise when it moves. I can't imagine that this doesn't flap around when you're going down the road, making all sorts of noise. I also question the long term reliability of it. It just felt cheap.
Fit and finish of the interior was extremely cheap as well. There were little trim pieces that were screwed in to the wall above each of the side exit doors. I backed in to one and hit it with my elbow when we were looking around inside and it literally fell off the wall. The screws that held it on were only protruding about 5mm from the board, which isn't much, and it was immediately obvious that it wasn't screwed in to anything of substance, just the thin wall board material. I would have preferred that they just left these things off, since they serve no real purpose, don't look that nice, and it's obvious that they are just going to fall off anyway, leaving two or three holes in the wall.