I'm so surprised that 'Kanzan' are just opening out there. If you find that any of those open with white flowers, post them again corrected to 'Shirofugen'. That's what at that stage in Vancouver. Re the mystery trees, you know it's hard to tell without close-up blossom photos! Those look like double blossoms to me, is that right? If so, the first looks like it could be 'Amanogawa'. Are the blossoms facing up? And the other one, I'll guess 'Ichiyo'.