Decisions, Decisions

So I am in my friend, Mallie's wedding in July of next year and would like some feedback on dresses. She has given us a couple of options. They are both very pretty, and I am having a hard time coming up with my vote. Here they are:
The back detail on the 2nd one is very pretty with a row of buttons and the collar has a little beading. The first one is also very pretty in person!!! So hard to decide. What do you think?