sorry everyday, didn't know you had some experience in the field. here's a helpful site on the question. go to livingrivers.ca and punch up learn, scroll to difference in whites and reds.
those whites they trans planted to the vedder, chehalis, and harrison are another story, i usually only keep ones destined for the upper waters of the fraser. and if you catch one in the lower fraser, smell it first, they have a definitive smell to them. i call them risks to maintaining your marriage, i brought one home once, was told not to do it again.