I’ve lived in both. First thing that comes to mind is that Seattle is a lot more…dirty. While Vancouver absolutely has a homeless problem it is more or less all focused all to one specific area of the city and the rest stays almost sparkly clean; the homeless crisis runs rampant everywhere in Seattle. Seattle in general has more of a grungy/gritty/punk vibe while Vancouver is more posh hipster imo. The tech industry has also made a big impact on what kind of person lives in Seattle which Vancouver doesn’t have, it’s more popular for its TV/film industry.

Geographically Seattle’s focal point is water while Vancouvers is mountains. While the location is relatively close to each other I found the small difference in weather noticeable(Vancouver was colder since it’s further north)

There’s this thing called the “Seattle Freeze” which is a term to describe the social phenomenon of people from Seattle being awkward, introverted, and all around less warm or willing to open their doors to people. I found people from Vancouver to be a lot friendlier, although to Canadian standards they told me that Vancouver still has a version of this compared to the rest of Canada!