I've done quite a few B2B's. sadly not every port is consistent. Some ports you will get off the ship, go through customs and then escorted back on the ship. Some ports, you will sit in a lounge, they scan your old sign and said card to remove you off the ship and then give you your new S&S card and you're on your way. Some ships used to take a photo of you and your mimosa. Not anymore. I guess you get a coupon for a free drink now.