I'm not sure exactly what you mean by "inverted upside down"(?) If by "inverted upside down" you mean literally flipped (the Northern Hemisphere would be south, and the Southern Hemisphere north), then there wouldn't be any difference on the temperature of the Earth. The inside of the Earth follows a temperature path called the geotherm, and it increases with depth, regardless of where you are on the planet.

Look at the graph on the link below:
link