Mixed Black Swedish or a Cayuga?

[wealdooo]

I have hatched eggs with the incubator and also gotten ducklings from Tractor Supply in the past. So I always thought the black duck on the left was one we'd hatched because I assumed it was a mix of our black swedish and pekins. But, the more I look at it,it looks more like a Cayuga (which we've never had before). I would just like to know whether ya'll think it is actually Cayuga or if it's a mix? Our black swedish is on the right, so you have a comparison there.

 

[Ozarkhomesteader]

looks just like my Cayuga's to me...that is if you are talking about the duck in the center. any black swedish mixes had some sort of white of their chest, but i can't see his chest too well