Corned beef is cured in brine; this other deli meat is seasoned brisket that's been cured, smoked & cooked
[DOC] [TLE] Making Corned Beef from Scratch - AmazingRibs.com [PAR] (2) Cooked and ready to eat corned beef is cured in a brine with curing salts, 
regular ... then cooked, and usually packaged in slices or sliced at the deli 
counter.