What you need essentially for using the SD 2 is the possibility to send MSB/LSB and PC midi commands (bank change and program change) in order to select the sounds you want. I'm not sure BK-9 can do that in a flexible way. The MOX can do it, it has got 128 master storage locations, and in each master you have several zones which can send a MSB/LSB/PC setting each, which changes the selected sound of the SD2.

Another option is to use the SD2 with an iPad if you use the app "Set List Maker". This app allows you to create set lists and store midi commands for each item in the list.