So I read from somewhere that there was a difference in hard cases and soft cases. I don't remember which case it was, but one of them is better for your iPod. I read that the back of your iPod acts as a cooling system because it transfers the generated heat from the iPod onto the surface that it is touching. But one of these two cases don't allow the heat to transfer as well or at all. So does anyone know which one it is? I bought a hard case today and I want to know so I can take it back if I have to.