Definitely a guesstimate, Frillylily, yes! I like your keen eye, and Sharon's choice of a similarly blue-shifted photo leads me to believe that the purple color itself may be quite different than SB.
Terry's mentioned before that any possibility of selling potential NOIDs would not occur with uncertain registration names, so I trust it is just to explore potential look alikes (could always purchase a true-name cultivar once one is found that they like as much as the NOID).
You are so right, though, pale background with purple eye and edge ... lots and lots and oh so many lots more of them ...