FunkyFarmFlocks
Chirping
If you're still undecided between the 2 breeds that you love, I may have a suggestion! Get both! One of each of however many that you'd like! Other breeds get along with each other no differently than ducks of the same breed. If you are raising them together, it'll be no issue at all. Both breeds are very beautiful! I have one of each and had another SA last year that the neighbor's dog unfortunately got to. SA's are very docile and seem to get more beautiful as they grow. I'm still a little new with the Welshs but mine has been very quiet and friendly with the younger ducks.
Also, I asked on a local FB page about poultry, and there seems to be a good market for them locally. Another thought I had is since they're related to the Khaki Campbells, I can market the ducklings with this explanation and maybe get some people who were originally looking for the Khaki's and like this color better! 