What is the difference?
“Style/No Style” is an option for paragraphs and is only available when text is selected in an editor.
“Documents/Convert/Text to Default Formatting…” is an option for documents and is available only when documents are selected in the binder.
But what they do to the target text or document… is it the same? Is “No Style” equivalent to “Default Formatting”? Is “No Style” something other than “Default Formatting”? If they are the same thing, wouldn’t it be best to use the same vernacular, the same UI for both? If they are different, how are they different?