Back Ribs, also referred to as Canadian Back Ribs and Baby Back Ribs, originate from the blade and center section of the loin. Back ribs contain meat between the ribs called finger meat, and shall contain at least eight ribs.
on the other hand:
Spare Ribs are the intact rib section removed from the belly and may include costal cartilages with or without the brisket removed and diaphragm trimmed. Spare Ribs shall contain at least eleven ribs
