What's the Difference Between Corned Beef and Pastrami?
Although brisket is commonly used for both, corned beef can also be made from lean round, while pastrami can also come from navel (plate) and round. Corned beef is first soaked in a salt water brine with pickling spices, then boiled.
The process for pastrami varies widely, but in general, the meat is first cured with a spice rub or soaked in brine. From that point, it's encrusted in peppercorns, then smoked. The beef may be hot-smoked all the way through; if not, it is then steamed or simmered. Were you aware of the difference between the two? Which do you ask for on a reuben?
Source: Flickr User Marshall Astor