Not to bore you, but.............

[Byron haugh]

Are there other flies that are a different color on the thorax and abdomen? The Pmd's are so obviously different colors, but any others are mostly much more subtle, aren't they?

I would agree. I think the color variations are perhaps greatest with the PMD's.
The other insect I use comparaduns primarily for are flavs. These I tie with less significant color variation for the back of the abdomen.