I have exerience with quite a few of those in reef tanks incld acclimating a few hundreds specimens coming from Oz.
Basicly they are very hardy, ALL should eat in case given the chance to, I mean do not put them with agressive angels , triggers etc, you can put the angels in a later stage, I always prefer the Personifer to be the largest angel or otherwise to put it with non agressive tank mates.
The only cases I saw specimens not eating are mature and extra large specimens.
Those are popular in hk and come often, sometimes they wont addopt well.
I saw just now a male around 10" , eating pellet food and nori 24hrs after arrival.
I guess as Zemuron said, it's just a matter of collecting and handling.
About the colors, I never saw XL female that holds the very bright colors on the face, they will have a blue-purple face with some kinds of dots, but not the clear marked beautiful dots on the bright blue-purple face.
As mentioned, the males have elongate body.
I found them somwhat sensetive for cryptocaryon.
For high success rate, try to secure a medium specimen, those do eat quickly.
There is also a color change between areas of collection, in some areas the colors are brighters.