AI sphere= http://design.tutsplus.com/tutorials/wrap-a-ribbon-around-a-sphere-using-3d-revolve--vector-3908
AI= 1. In AI, its harder make shapes, add effects in AI is a little harder than in Ps.
2.The purpose for AI is to add more effects and being able to make it more than just and edit.
3.Everything in AI is not on a single layer, so its somewhat hard to actually fix something if needed.

PS Sphere= http://www.icondrawer.com/tutorials.php