Jeremy Stone has done hypo motley x hypo motley, this is the breeding that produced the "red devil." If you are not familiar with the Red Devil, it appeared to be a bright red super motley, being with no pattern. Unfortunately it did not live.
I believe Frank Martin also did the breeding and also produced red devils, which did not live.
There has been speculation whether or not a red devil is a hypo super motley (which in theory should be impossible) or if the red devil is a freak gene, which also may be a lethal gene? Considering the fact that we have seen super motleys produced from a breeding involving only one motley parents, nobody really knows what to attribute the super to, or the Red Devil.
The other breeding you mentioned of a hypo motley x motley, in theory should only produce Super Motleys, Hypo Motleys, and normal motleys, however I do not know if anybody has done it, would be interesting to find out though....???