I think both colors would be good. You might also want to do weekly pictures of both colors for educational purposes. The folks in the peafowl forum try to do it for peafowl:
http://peafowlimagedatabase.weebly.com/peachick-images.html
Hey maybe you could get some close pictures of your ducklings, and I could get some of mine, then we could make a thread that shows the differences between the two?
A few years ago I sold a bunch of ducklings to someone. They asked if I had Muscovy eggs, and I did, so I sold them a bunch from several nests that were one to two weeks hen incubated for $1 each. They later reported that one that hatched and it was not Muscovy. Was it a Mule, or was it one of...