I've never seen Prunus maackii (Manchurian cherry, or Amur chokecherry) in Vancouver, but I saw a lot of them in Calgary last week. Maybe they don't do so well in our damp spring climate? Many of them were beautiful trees. I see that there are some cultivars, 'Amber Beauty' being one that appears in a lot of google photos. I would guess these are cultivars, but don't really know how to tell. This one is in the Reader Rock Garden. This is a street tree in the Elboya neighbourhood in SW Calgary.