This is a great idea for a thread!
I have always wondered, what is the difference between jubilee, speckled (as in speckled sussux for example) and red porcelain genetics wise? They all look the same to me. Are they basically the same colorings, just different names?
Jubilee is based on dominant white (take a Dark Cornish and by adding one I or sometimes, in theory at least, by adding two blue dilutions as in Splash) and genetically called Double Laced Dominant White. There should be no real black present since dom white (no colour in double dose) and splash (diluter of black) would be expected to somewhat eliminate its expression in the plumage.
Europeans label Porcelain as Mille Fleur and the US, UK, and Australia, they call this variety Isabel Mille Fleur ...Speckled as in Sussex is Red Mille Fleur.
Please provide photos of the real birds you say "all look the same to" you in Jubilee, Speckled, and Red Porcelain if you are serious about having your query answered. Every country, every person, every breed, and every poultry community defines the colour genetics differently by using hobby names. A photo of a day-old chick in dry down and a few photos of adult (side profiles work well if only one is possible) in question would then clarify how you see them as the same.
For me, a decent Jubilee looks absolutely nothing like MDF...ever...and an Isabel Red Mille Fleur should be a lighter version of MDF (lav/lav added) whilst just a Red Mille Fleur (found in
Tricoloured Wyandotte, Spangled OEG, and Speckled Sussex are all based on different e-series plus other mutations...complex formulas which may or may not include Co, Db, Ml, and Pg) would be a much darker version of the usual MDF because of the mutations of recessive blacks and Mahogany added to the recipe.
Doggone & Chicken UP!
Tara Lee Higgins
Higgins Rat Ranch Conservation Farm, Alberta, Canada