Different colors of mappas

[shellhunk]

I have lots of mappas in my collection. I've been researching on the net but can't find answers. I'm not even sure how to group them because some have pink base, some offwhite, some have brownish/purplish base. Some have this dark brown dorsum and others tan. Are all mappas found in the philippines just the typical mappa mappa? HOw is a mappa rosea identified? What is the best best way to group these mappas.

Chris