I'm not sure comparing whose funeral was bigger is appropriate, but I post some info from wiki
The memorial service was organized by Jackson's concert promoter, AEG Live, and AEG Ehrlich Ventures, LLC (Kenneth Ehrlich - Executive Producer),[5] who gave away 17,500 free tickets to fans worldwide through an online lottery that attracted over 1.2 million applicants in 24 hours,[6] and over a half-billion hits to the webpage.[7] An estimated 750,000[8] up to a million fans were expected to congregate outside Staples Center[9][10] but due to Los Angeles's $530 million budget crisis, city and police officials urged fans to stay home.[11] Street and highway exit around the Staples Center were sealed off,[11] and 3,000 officers, the largest security effort planned since the 1984 Olympics,[11] were on duty at a cost of $1.4 million to the city.[12] The motorcade for Jackson's casket was headed by two police motorcycle outriders, and the LA freeways were closed for the journey of approximately 11 miles (18 km) from Forest Lawn to the Staples Center.[13] The service was broadcast live around the world. The United States viewership was extremely high taking into consideration that the service was unusually held on a workday (Tuesday) and a host of people reported watching the service during work.
Live broadcast
The service was broadcast live around the world, from the U.S. to Slovakia to parts of Asia. Public screenings were held in 37 cinemas across the U.S., as well as in Barcelona, Berlin, Brussels, Bucharest, Gothenburg, Lisbon, London, Madrid, Malmö, Oslo, Paris, Milan, Seville, Stockholm, and Tallinn.[26] There was also a live broadcast at 3am in Melbourne, Australia at Federation Square.[27] Before the event, the organizers expected an estimated one billion viewers.[28][29][30] According to Nielsen, 31.1 million Americans watched the service live on television;[31] an amount comparable to the 35.1 million that watched the state funeral of former president Ronald Reagan in 2004.[32] According to some news sources the event exceeded 2.5 billion viewers, which would make it the most watched live television broadcast in history worldwide.[33] Although this number is not widely agreed upon.
There weren't as many people because roads were sealed off and they were urged to stay home, which wasn't the case in Ali's funeral.
