Does anybody know for sure what the differences are from the Blast V11 to the Blast V12?

I have always wanted an RB C6, and I keep hearing that some of the Blast models like the V8 and the V12 are basically rebadged C6's. Is the V11?(could get one for a good price..) Also, what about the V14?

And do all of these have the c.rappy Novarossi black front bearing?..

And last question, what exactly is the advantage, if any, of the MES exhaust porting or whatever? In the descriptions the V11 just says "5+2" for ex., but the V12 and V14 say "5+2 with MES..."



Thanks..