Welcome to Canada
@Swellgal ! I have experience with the Vancouver boutique and a couple SAs there. You can DM me if you want to hear about them. I think like any boutique there are great SAs and less great SAs.
I agree that you should commit to the boutique in Vancouver. Even before the tariff discussions, I think the border services duty and taxes would be 20.5% for bringing items into BC from the US. So it wouldn't make sense to continue to shop with your US boutique.
I've always heard here that your total spend (in different countries) will all count toward MTO/SO but that for HP it is more related to your spend within the boutique you are interested in obtaining the HP from. I'm not sure how difficult it is to get HP in the Van boutique, I have not tried to obtain one.
I've also been told Vancouver receives many US customers which contributes to the competition. I think it was substantially better pricing for Americans given our weaker dollar. However I am curious if this will change since the latest PI, as our prices increased more than US prices. There doesn't seem to be much advantage from a pricing perspective anymore.
Oh also, I don't know if the e boutiques are the exactly the same for inventory, it's an interesting question. When I have called CS, they are always US based SAs and no one asks where I'm located prior to checking for stock.