Okay here it goes: Both dresses are nice with the right accessories, black is a downer so you need to pair it with a bright yet elegant color if you're going to a wedding. Gold is perfect..
First dress:
1. Get a thin gold belt. Thin belts are in right now and it'll brighten up the whole outfit. You can find it at forever21 for $2.50 YES. $2.50!
here's the link
http://www.forever21.com/product.as...y_name=acc_belts&product_id=2064746916&Page=1
2. Considering the length of the sleeves wear a thin nice bracelet, or just a nice watch
3. Unbutton the first button if it's possible, it might look a little sexier and less conservative.
4. Don't worry about a necklace, but wear BOLD Gold earrings, the bigger the better, don't hold back.
5. With this dress, DO NOT put your hair up, you will look like a school teacher.
Second dress:
1. Lose the cardigan, it makes you look like you're going to a funeral, wear a shawl instead to cover your shoulders.
2. Gold Bangle
3. Definitely necklace! Something delicate would do.
4. Small earrings.
With both dresses you should wear a nice looking clutch for your stuff
I personally would wear the second dress, good luck