No, the DB6 is also a 1000 (or maybe 1100, the Hypermotard engine.... I'm not sure) but was originally a "naked" bike version of the DB5. I'm not sure the exact differences, but I think that is why Mavros runs that GSXR fairing on his. There's nobody that makes bodywork for the thing.
Unfortunately it fits within the rules so it's legal.
That being said he only went .25 second faster than my 1000 and that is completely SS legal, so maybe it's not as big of an advantage as we think. Charlie is the only one running a Bimota in SS, everyone else we've been referring to here are running Thunderbike or Supersport.
I would like to see the LW rules changed around a bit, maybe limit the displacement to 1000 cc (instead of 1200 big bore kits) The 1200 rule was for Buells, and should really be push rod only.