The latest US and Australian casino ratings from industry research firm Accenture.
The new ratings have not been published in full and have not yet been independently verified.
In the US, the Wynn has increased its share of the market, and is currently ahead of the $10.5bn $8.5 billion Vegas.
In Australia, it has dropped in the rankings and is behind the $6.5-7bn Wynn, but has managed to retain its position in the top 10.
There is also a new category in the US of casinos in a high-rise building with a “low floor”.
This is a category that is only visible to the casual traveller, and only to a few casinos in the area, such as the MGM Grand.
This means it is not visible to an outside observer, although it is important to note that this category is still being refined.
The Wynn casino in Las Vegas has been criticised for its use of an open plan dining area and no designated bar, and the casino’s use of a small room with a table on the floor.
The casino has not responded to requests for comment.
Accenture also said that the Australian ratings are “still in flux”, with the casinos in Australia not yet being ranked.
“The ratings system in Australia is still evolving and we expect to update the ratings system as more information becomes available,” a spokesperson said.
“Accenture is not able to comment on individual casinos, but we will update our ratings analysis at a later date.”
The Wynns is the biggest casino in the country, with a total of $1.6bn in revenue.
The casinos are also the biggest in the world.
It has been the site of one of the biggest scandals in gambling history, when a Las Vegas gambler was sentenced to 30 years in prison for running a ring of fake casinos in order to take advantage of customers.
The gambling industry is already reeling from a new era of US President Donald Trump, who is threatening to impose new sanctions on China over its currency manipulation and the use of state-controlled gambling sites.
In an attempt to appease Chinese regulators, Wynn is offering a 20 per cent discount for American visitors to the casino, which is also the largest in the nation.
There are also plans to open a casino in China that is being funded by the Chinese government.