BikerDoc5968,
I have to say I'm not an expert. So, these are all my opinions based on some informations.
These 2 species are very similar (carunculatum and amplebracteatum) I think mainly the lip that is quite different.
Siegerist say in her book about B.carunculatum " .. The dark mahogany-red labellum ... it is covered with small, lumpy outgrowths (caruncules), hence the specific name " She doesn't have B.amplebracteanum listed in her book.
Perter O'Byrne in "A to Z of South East Asian Orchid Species" has B.amplebracteatum and the picture is exacted as yours. Also he has a distribution map of this species which is only Ambon Island.
These are some info on Jay's website
IOSPE PHOTOS
IOSPE PHOTOS
Hope this help