Bridesmaids Dress - confusion

I was all ready to order bridesmaids dresses, but this weekend me sister & I found another dress possibility.

I am attaching pictures of the dresses and I need some opinions on what you think I should do.

I included my dress so you can see everything together.

The blue & brown chiffon dress is the Bari Jay dress that I originally picked. My sister (MOH) will be in blue & the bridesmaids in the brown.

The last picture is a Lazaro dress that we found on Saturday. My sister (MOH) will have the colors shown, ivory top & brown bottom. The bridesmaids will have the top & bottom in brown.