Re. the 'Emma' 8.35D.
The name intrigued me so I decided to send an e-mail off to German Maestro to ask how the various 8.35Ds ('regular', JFB & EMMA) differed, if at all, cosmetic differences aside. Here's the response I got:
Looks like they are the same (appearance aside) so presumably any difference in sound may be down to other factors e.g. source, burn-in (if you believe in it) etc. etc.
The name Emma, or EMMA to be more correct, is a sadly far less romantic than I'd hoped. It seems to be some kind of an industry group (car audio?) that German Maestro are part of so presumably the branding is just a PR exercise and nothing more: http://www.german-maestro.de/US/emma.htm
Both were running from the same source, fully "burnt" etc.
Yeah-yeah, they keep telling "there is no difference" to everyone. Different sound signatures exist, even fakes exist(ed).