Using getSofaDataStream instead of getDocumentText

I would like to known if it could be better to get the CAS text content by calling the getSofaDataStream method of the CAS class instead of getting it by the getDocumentText one.

Actually, CAS sofas can be set either by calling the setSofaDataString method (aka setDocumentText), or by calling the setSofaDataArray one, or by calling the setSofaDataURI one. However, the getDocumentText method (aka getSofaDataString) provides the content of CASes whose sofas are only set by the first method whereas the getSofaDataStream method retieves content whatever the called method. A method able to get String from an InputStream is then needed.

Am I wrong in thinking it's an Improvement?