I’m stuck between 2 dresses!

Ladies, please help me! I am sick over making this decision and have no luck deciding. I am having a barn wedding this October. My fiancé expressed he likes less poofy dresses, so I tried a mermaid on a whim, and despite feeling like I was always too large to wear something like this, I loved it! But I also always envisioned myself in a romantic flowy dress and also love this other one. The mermaid is sparkly with subtle glitter that catches the light with gorgeous color, very bridal and grown up. But the a-line has sparkly beading and would allow for more room to move, but be scratchy under the arms. Both have pros and cons, but I am dying over this decision. I thought I was going to pick the mermaid, but I keep going over pictures and get more and more confused. HELP!