Audio quality stats are color coded to Green (good), Yellow (Average) and Red (Bad) according to recommended values (mentioned below).
10ms - 30ms
0.5% - 0.9%
-80dB to -40dB
200ms - 300ms
For each suspected issue a specific audio quality metric has to be referred. The stream will lesser number of greens than the other for that metric, would be the stream contributing more for the issue.