What is the Yamaha 2100E-B?

Im seeing loads of reviews of the Yamaha 2100EZ drives however these arent available and i can only see the 2100E-B for sale at a tempting price (OEM). I suspect that this may be the 2100+Safeburn or something but i cannt be sure, also the Yamaha site doesnt seem to have any mention of the “B” series. Note that the SCSI version availabe at the same retailer also has the B (2100S-B) . Can ne1 shed any light on this or is there a review maybe?? thx