Your girl does look like a Blue Swedish, but just one with a bit too much white on her head and a bit of a big, irregular bib. Swedish are not meant to have a crest but as Kevin says it can happen in any mallard-derived breed. Otherwise, your girl has a nice shaped head for a Swedish and a lovely straight bill From what I can see her feathers look very nicely laced as well (a darker blue edge on them, which the breed is supposed to have). Your boy is obviously showing a lot of brown, which is a fault in the breed (and which is actually a pretty common fault), but he looks like a nice, solid, healthy boy. You are obviously looking after them very well as their feather condition is great. I hope your girl is a good layer for you.