My girl has a very cottony coat. You can tell the difference if you shine a flashlight in their eyes. You can also look in a picture when they are looking at the camera. If the eyes shine back green, then they have a silky coat. If it is more goldy, then it's cottony. Also, a cottony coat doesn't seem to turn the steely blue color but will stay more black as the dog gets older. Cotton coats also knot very easily and it's hard to keep them long since there is so much upkeep. Both are pretty but have their pros and cons...also there's personal preference!
If you search under 'cotton coat' there should be several threads that come up! Either way, your baby is beautiful!