Oranges are really thick and complex, but I wouldn't compare them with an XTC. That would be, well, like comparing apples and Oranges.
With the limited playing time I've had on each, I look at the XTC a lot like a modified Marshall: It has that inherent midrange emphasis and tightness with some added gain/saturation. The Oranges, while very complex, are like a darker Marshall and feel a bit more "chewy" like the signal has more give.
That's at least how my ears/hands notice the differences.