What is the difference between king quail and button quail

[qlicer49]

They look the same from what I've seen.

 

[TheWeeBee]

King quail and chinese painted button quail are the same species (coturnix chinesis). If you're talking about the more generic term (button) for these tiny quail, there are quite a number of subspecies.

 

[James the Bald]

Yes, they are the same. This link has more info about their subspecies.
James