The fundamental difference is probably one of semantics. In my mind, CnR relates to the special season(s) that WDFW sets to TARGET wild steelhead. WSR says that wild steelhead, whenever and wherever they are caught must be released. Quite frankly, I'm not sure how WDFW can have CnR seasons on Wild Steelhead under the current moratorium. If every wild steelhead is valuable (as it seems to be under a blanket moratorium) then hooking mortality is too high a price to pay for a CnR season. That is the way that this supporter of WSR sees it. I will not participate in a targeted CnR season because the genetic cargo that Wild Steelhead carry is too valuable to waste.
Disclaimer: I am not a member of any group nor am I attempting to or speaking for any other supporters of WSR.
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"You're not a g*dda*n looney Martini, you're a fisherman"

R.P. McMurphy - One Flew Over The Cuckoo's Nest