flatshaded sphere = geo sphere. If there is a difrence it isn't in number of polygons or any thing you can visually see.
Sorry about all that geo sphere stuff I was thinking of some thing else. Something glitched once and my spheres auto flatshaded and in the end I fixed it by changing thing in the geosphere menu so ever scince then I have goten the two confused. Any ways I saw one or two flatshaded spheres in there.