Well, I got them both as well. I mainly bought Linger In Shadows cause I like orchestrial music and interactive artistic experiences and that's exactly what I got in that game. But I guess it's not for everyone. I enjoyed LIS a little bit more than NOBY NOBY BOY cause I felt like I was involved in a unique story.
As for NOBY NOBY BOY, I mainly bought it cause I heard Katamari Demaci was a decent game and the same developers made it and I was looking for something different. But this game was...ok, I guess. It's a very wierd game w/ no point to it really (the game even mentions that lol

), mainly just to screw around in a world we may never fully understand, but it was kinda strange in a good way and the trophies were fairly easy.
Hope this helps!