I have not bred my Enigma just yet, but do own a Bell(RE Enigma). I`de say the morph reacts differently in the Trempers than it does the Bells. Bell Albinos can usually have some very dark markings on the body, while Trempers(not incubated too low, or "cooled"), not so much. This could also have something to do with it, but I suspect it is both.
Other than my guess stated here, I`m not sure anyone can do anything but "guess" at this point. They are after all, an "Enigma"!