Here is a comparison chart of WAE and SAE where SAE are 20% heavier at length. The alpha and beta are solved first from two WAE length-weights that came off a chart. Not sure how current it is. If the original WAE chart is too old I could adjust. I do not remember the original source. Snipe, also if you have a set of samples for SAE, I could solve using that set specifically for SAE.
Probably the best way to compare WAE to SAE is AGE-WGT. IIRC one of Snipe's SAE exceeded 5 lbs in its 3rd year from stocking. Nice. Never heard of anyone doing something vaguely similar with WAE.
It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers