Last year's Buzz! Quiz TV brought the series from the PS2 era to the age of DLC and user-generated content. It's remarkably easy to create your own quiz, and judging by the quizzes floating around Sony's DIY quiz website, a lot of gamers really like Family Guy, PlayStation products and WWE. All of that content is downloadable, and you can play user-made quizzes or buy specifically-themed ones from the PlayStation Store. Also, you can test your wits online against other Buzz! players.
All of that content still applies to the new game, but the difference between Quiz TV and Quiz World is immediately noticeable.