are you referring to the big WC specimens that show up on DD? i assume so, since there aren't any reidi listed on LA.
if so, altho DD has a good program in place for most of their fish (i get many of my scorps from them), and they do follow a good prophylactic treatment protocol.
one thing to consider: don't but a SH purely based on color, as they can be whatever color they feel like being.
all that being said, i don't doubt the SH are eating frozen for them.
IMHO, unless you have a compelling reason to get a WC such as size (IME, adult WC's will always be larger) or for brood stock, you might want to consider getting true CB specimens from a quality breeder such as
www.seahorsesource.com.
i do have to agree, however, those big WC reidi are certainly impressive when you see them "in person" or have kept them...