I love both... but I think down is my favourite look. The updo looks very elegant and classy, down it's a little more simple but looks really great with the neckline... Depends what kind of look you're going for.
Hair up - looks elegant, regal and just picture perfect like it belongs in a magazine
Hair down - looks romantic and sweet and very bridal and less like a magazine
I would say hair down and then through the night you could always just put your hair in a low bun for a few pictures? or Have your hair in the updo and take it down at the end of the night for some pictures?
Down! It seems to pull the whole look together. You look great in both though. IMO the dress is incredible and with hair up it looks maybe too polished? I DK the word I’m looking for but you look effortlessly stunning with your hair down in that dress
I love it down! But the updo also looks so elegant. Perhaps you can have both? Maybe have it up while you do the ceremony and then have it down during your reception for a more relaxed look for the evening?