Hi shakey,
From what I can tell so far with the ones I have seen, and the few that I have, the motley gene does not appear ro express itself the same way in diffused/bloodred animals as it does in other morphs.
They appear to me to either be striped or motley/striped or appear to be a fading pattern more than anything else. My 06 granite striped male is now patternless. I call him striped, but am not completely sure. When he hatched last year I asked in here if he was a motley or a striped and half the respondants said motley and the other half said striped!
I have never seen any kind of a bloodred/diffused motley that had the "regular" motley pattern. At least, not yet.