The only model/part number markings on this "hub" are on the wire of the purple input connector, which says 6110018300 D. A picture is ideal to confirm, as I have seen some results showing the other variant instead. Sometimes the site will add a -B or just a D (both of which I've seen for this RF connector variant) to the end of that number.
The model/part number marking on the non-RF connector "hub" has 6110020700G on the purple input connector wire.
So it seems they do have different model numbers, but a picture may help confirm for certain.
A post on this forum from 2 years ago seconds what I've seen:
http://www.digitalfaq.com/forum/vide...html#post48393
I would suggest a note be added on the ATI MMC master thread, if there isn't already. Threads like this one tend to get lost to time, just like the one I referenced from 2 years ago. These model number differences may be useful to someone else at some point.