title: What are the different between "Windows.Media.SpeechSynthesis" and "System.Speech.Synthesis"?
body: <p>I'm trying t o determined which of the two APIs have more features to do text-to-speech in a pro application developed in C#.</p>
  
  <p>OS is not an issues here, just how of the two namespaces offer more features, quality voices and stability.</p>
  
  <p>Have any body master both tech and could tell me about the different in those two namespaces? Is one of them a super-set of the another in terms of features?</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>Behind of those two namespaces is the same <em>speech synthesis engine</em>?</p>
  
  <p>My web app will do all the text-to-speech stuff at server side.</p>