Yea, that's basically what I was saying but I personally am incapable of finding huge distinctions between the two guitarists on Orchid and Morningrise as their styles really haven't developed.
^^ It's really just an assumption that they would play on the same channel the whole time in those two albums, though it's been said many times so someone might have it in writing somewhere, but, assuming its true, all you would need to do is find a video of Forest of October or something, watch who plays what solo, then listen to it on headphones to figure out whose channel is whose.