Hey Synch,
The Legacy Edition Hercules is plated in antique bronze much like the cover of "February." The limited edition Hercules is plated in antique gold like the interior pages.
As for the Head Key, the new legacy edition is plated in bright rose gold much like the Head Games hardcover. The sold out original was antique yellow like the interior pages. When there's a difference between interior and cover, and when fans have asked, we'd like to offer both when it's possible. I'm the sculptor, but I'm also a fan of the series - and a bit of a completest - so I think it's cool to have both in my own display cases. Of course that won't be the case with all keys. Some will be just legacy (like the Animal Key in August) and some just limited, like the Undertree (also August.)
Hope that helps.
Israel