Which brand is bigger, Wyndham or Sheraton?

The two are larger than the Wyndham brand.

Wyndham Hotel Group is the world's largest and most diversified hotel group, with 15 brands and nearly 7,440 hotels in 68 countries on six continents, with more than 638,300 rooms. .

Sheraton is the largest hotel chain brand in the Starwood Hotel Group. There are many types of hotels, covering general commercial hotels and large resorts, with a wide range of branches across all continents.