Tater as kona4lyf indicated, BB mount does not mean ball bearing, but bottom bracket.
ISCG refers to a mounting standard, there will be a mount welded or atachedto your bottom bracket shell/frame. BB mount uses a plate that is put between the bottom bracket cup and bb shell. Pricepoint has a good diagram for telling the difference. http://www.pricepoint.com/TECH_Page_ISCG_Etype.htm