We have a winner! A more careful look at my records for that spring 2011 order shows two Mardi Gras from Garden Valley Ranch (not Edmunds or S&W, sorry for the misinformation.) I recall having planted a Mardi Gras at the other end of the garden and digging it up a year later when its blooms looked indistinguishable from Dr Huey's. I must have planted the second one in this location. I looked at the photos of MG on HMF and I notice that my version has not yet produced any roses resembling any of those beautiful saturated photos of that rose at HMF - more like Chicochi's. Maybe it will behave differently when it has settled in.
This is not the kind of floribunda I am used to buying. One of the things I like about many floribundas is how they branch a lot and grow shrubby. This one is more stick-like in habit than most HTs that I allow to persist in my garden. Maybe some pruning next year will help.