On Tuesday I had my conversation with the second agent. It was a much quicker call than the one with the first agent. The second agent gave me a few revision suggestions (far fewer than the first one), then told me a little bit about herself and her agency. I explained to her that I was doing revisions for another agent and asked if she wanted me to send her the new version when I was done with it.
She said she would love to take a look at it, but her offer of rep would still stand!!!
I have an official offer of representation from an agent!
I'm going to finish my revisions for agent #1 and see what she says before making my decision. However, no matter how this plays out, I'm going to have an agent!