There is @Gillian 's confusion here: Non-PTS sutta numbering systems?
Which you had helpfully explained, but which still confuses me 
But I guess it isn’t too bad: If I search for “AN 10.196” I can just click on both the SC and DT links and hope one or the other is the one I’m looking for. 
Doesn’t work if I was given the ATI number (“an 10.208”) though… 