Sometimes a directory contains two version of the same song, one in 128kbit/s and the other in 320kbit/s. Both tracks will be matched as expected on the right side of Picard.

To determine which one is the "better", it would be very helpful to see some more details like the Bitrate or the file size.

Actually, you have no chance to directly distinguish between two matched tracks because the details don't show any of this distinctions. You have to press CTRL-I for every single song to see the Bitrate, Sample Rate or Channels.

I suggest to show this informations in the Tag-Panel or even better: Consider the better/higher Bitrate in the matching process and adjust/reduce the color for lower quality track.