Baby back ribs and spare ribs come from different regions of the pig. Baby back ribs are taking from the top of the ribcage, starting between the spine and extending to the point where spare ribs begin, below the loin. For this reason, they are sometimes called back ribs or loin ribs or pork loin back ribs.
Synonym Discussion of TYPICAL. regular, normal, typical, natural mean being of the sort or kind that is expected as usual, ordinary, or average.
I would also like to add another difference between the two. 'Typical' implies 'symbolic (of a particular type)', while 'usual' connotes 'habit/custom'. These are derived from the roots (typicalis and usus, respectively). So, if it is typical of a restaurant manager to come in early, it will be 'unusual' for him to be late on a particular day.