I have 2 boys, from the same liter. One has a cotton coat and one has a silky coat. Fletch is silky and a lot more silvery, Dexter is black still, no silver. They are almost 2 years old.
Sorry I had a bum shot too, but you can really tell the difference with this pic!
pic 1 - fletch in back (silky) dex in front (cotton)
pic 2 - Dex (cotton)
Pic 3 - Fletch (silky)
Pic 4 - Left Fletch (silky) Right Dex (cotton)