Pros and cons of listing at the same time as a neighbor?

We're in a small, desirable town. By coincidence, my neighbors and I are both selling this year. Their house is considerably nicer, let's say theirs is 2M and ours is 900K. I'm wondering if there are any ways this would be beneficial or work against us. Also if using the same agent would be a good or bad idea [small town in which only 2-3 agents really know the market].