The parties are substantially the same, in both actions, where parties in one action are in privity with parties in the other action.
(pssst.... It's National Book Week. The rules are: Grab the closest book to you. Turn to page 56. Copy the 5th sentence as your status. Don't mention the book*. Post these rules as part of your status.)
*Since this isn't Facebook I will "mention" the book (see photo above).