It looks as if the quake down there was a plate slip. means that the plate slipped sideways. The duration of those are a LOT less than what the Cascadia would be.
The Cascadia will be a subduction quake. Subduction zone breaks are longer in duration and LOTS more severe.
The Japan Quake and the Indo quake a few years ago were subduction quakes.
Well aware of ALL the possible outcomes. I’ve studied the Cascadia on an amateur basis for awhile now. Since I live south of Tacoma, and about 450 feet above sea level, and well away from the water, ground shaking is my biggest concern. Not sure if my house would fare too well.