This long-time resident of Seattle (well, Redmond) favors Portland for both golf and non-golf reasons. From a golfing perspective, Portland is within striking distance of both Bandon and Bend, and not any farther from Wine Valley than Seattle. Chambers Bay is "relatively" close, too. (But not, as Garland claims, anywhere close to equidistant.)
I don't know much about public golf in the Portland area but I can't imagine it being any thinner than the Seattle area. At the same time, the Privates seem generally more accessible and affordable. For whatever reason, Royal Oaks sounds interesting to me.
From a non-golfing perspective, Portland has a lot going for it. I like Seattle a lot and am happy to live here, but could easily see myself making a move to Portland someday.
PS - If it comes down to taxes, one can live in Vancouver, WA and enjoy the benefits of no income tax on one side of the river and no sales tax on the other.