I don't think you could ever get a right answer. I don't think the brain can be quantified into areas that "store" and areas that "execute." The human brain has a certain amount of "power" that can be divided as such.
This is borne out by "idiot savants." Those people that can memorize massive amounts of information but are inevitably lacking in other higher-order skills. I also know people that have incredible talent at one task but can't memorize anything to save their life.
I think the human brain is often underestimated. It has to assimilate and react to an incredible amount of information. For example, look around the room you are in right now. You can probably look around and immediately identify everything in the room. You can name its color and its purpose. You can most likely remember who made that object. When you think of who made it, you can probably name a fact about that company and think of the factory it came from and the people that work at the factory. The human brain is not very good at memorizing information on a pixel by pixel or bit by bit basis, but is excellent at memorizing concepts. The higher-order concepts take an incredible amount of processing power. I think it is very difficult for a computer to tell you why something is the way it is.
Furthermore, your brain can instantaneously imagine a 3d landscape. I can place a 3d person here and a 3d tree there in a split second. The resolution may not be very good, but the human brain doesn't think in pixels. However, I can imagine myself zooming into a tiny little spot getting close enough to view the the scene on an atomic or quantum scale. Can I give you the exact speed and direction of the electrons? No (but neither can anyone or anything). But I do have a pretty good idea of the concept and how it exists. More importantly in our case, I can imagine what the little girl in the scene is thinking and what she is going to do next. That ability cannot be taken for granted.