A couple weeks ago two friends, my son and I were flying together.
The friends have top cap's and we have 540p's. We traded planes to see what the difference might be. The top caps would do any thing you wanted but the edges would do it a lot slower. The wing on the edge is thicker than the top cap. This seems to be why the edge will fly slower. If we tryed to land the top cap as slow as the edge it would fall out a lot sooner. It didn't matter who was flying what. They were both a lot of fun to fly.