yes ive seen this before where lfs has both 'gold dust' and buettikoferi. sorry let me clarify. i didn't mean the stores are using the name 'gold dust' instead for all buettikoferi. What i meant was what they're calling 'gold dust' should really be just called buettikoferi, along with the rest of the buettikoferi they have.
i've seen pics of what are called 'gold dust', but they look more like buettikoferi than the 'gold dust' specimens in Aqualog. Since Aqualog author coined the term 'gold dust', thats why i take his description/pics as what it should look like, and so far only seen one pic that looks like those. Now in the end 'gold dust' is probably just a color variant of buettikoferi, but thats beside the point.
don't get me wrong, buettikoferi/gold dust are one of the prettiest bichirs around. you should definitely get one. their growth don't seem to be particularly fast, so your upgrade plan should be fine.