Today, I tasted an Orri orange bought from a local supermarket.
It has a very sweet (Sweeter than gold nugget or Sumo I had, much sweeter than Satsuma)and clean taste, with a slightly hint of sour, and very good flavor. Peeling is easy. The inside is easy to separate with tender texture with no residual. It does not have the bitter or spice taste someone may prefer.
Overall, I would prefer Orri over Sumo.