Right on, soy is definitely complete just sulfur based amino's are lower. BUT I will say that biological value of soy is lower compared with cow milk.
Nark do you know the value for soy...84 or something?
Also I have supplemented with soy protein. When they make soy isolate they take out the inherent protease inhibitors and even add more methionine sometimes. Perfectly good protein source to use.
But I also like to get my milk from Webb's utters.