There may be some overlap, but it seems to me that they attract different types of young men. KBY is hesder, whereas NIRC is an American and Yeshivish – from what I understand more “out of town” yeshivish.
There may be some overlap, but it seems to me that they attract different types of young men. KBY is hesder, whereas NIRC is an American and Yeshivish – from what I understand more “out of town” yeshivish.