Wide aspect vs Narrow aspect

[VanMan]

After looking at all the pictures in the picture gallery, I noticed that most of the robots, or at least more than I had expected, are narrow aspect(the front is the shorter than the side of the robot, I don't know if other teams use this terminology). Our robot is wide aspect and can pick up balls along almost the entire front. Also, it can turn more easily than any of our narrow aspect robots; which seems like a big deal for trying to collect balls off the floor. So, why narrow aspect? Are there some benefits that I am over looking?