If anything, to me, random broken temples are much more bland than those uniquely shaped mountains in the background. The coloring I also find to be much more pleasing to look at. I take art theme over "graphics" any day.
The colors on the 3DS stage look garish, but it could just be that shot. I much prefer the more neutral tones on the Wii U version.
Plus that spiky mountain range in the background looks like they just copied the same one a bunch of times.