I touched briefly on this topic on issues I was having with PAL render quality awhile back. But I would like to make sure I'm rendering out my video with the best quality settings that Adobe has to offer with both APP and AME.
I captured some footage from a broadcast station and tested the difference in quality. Here are my video settings from both AE and AME.
720X576, 25P Widescreen 1.46
Added to AME for render
Here are the settings I am using when I render out MPEG2 SD video.