All of it. More activities. More trivia. A different menu every night (no repeats). A special menu on the transit day. Different entertainers usually come aboard mid-cruise to provide more variety the second week. A specialist came aboard and did several talks in the theater leading up to the canal day about its history and how it works. Then there was narration throughout the 8 hour passage. There was also a bbq out on deck especially for this day. Many, many fewer children on board the two week cruises so they get way more personalized attention. I know on ours last year they had a "real" sleepover instead of just the "PJ Party" they do on regular cruises. Also the adults get the chance to take over the kid spaces late a night a couple of times and do activities. We painted animation cels and made Flubber. All of this plus two full weeks to enjoy the ship. It was heaven!