Accept and Accept-Charset - Which is superior?

Question

In HTTP you can specify in a request that your client can accept specific content in responses using the accept header, with values such as application/xm

Answer 1

Firstly, Accept headers can accept parameters, see https://tools.ietf.org/html/rfc7231#section-5.3.2

All text/* mime-types can accept a charset parameter. http://www.iana.org/assignments/media-types/media-types.xhtml#text

The Accept-Charset header allows a user-agent to specify the charsets it supports.

If the Accept-Charset header did not exist, a user-agent would have to specify each charset parameter for each text/* media type it accepted, e.g.

Accept: text/html;charset=US-ASCII, text/html;charset=UTF-8, text/plain;charset=US-ASCII, text/plain;charset=UTF-8