Difference between Azure AD SSO logout URL's

Learned that SSO logout can be done by using any of the below URL's.

https://login.windows.net/common/oauth2/logout?post_logout_redirect_uri=<<Application Reply URL>>

&

https://login.windows.net/<<Tenant ID>>/oauth2/logout?post_logout_redirect_uri=<<Application Reply URL>>

But, question is what is the core difference between both URL's if any.

Thanks

Siva Pokuri.