I have been thinking about it, and I realized something. If Intel's TDP is the amount of heat that has to be dissipated, then perhaps the reason that the G0 has a lower TDP is not because it actually runs cooler, but that it can tolerate more heat. More tolerance for heat means that it doesn't need to be cooled as thoroughly, and thus the lower requirement for heat dissipation (formally known as TDP). It may take 105W of dissipation to keep a CPU at or below 62.2 C, but it would take less dissipation capacity (95W, perhaps?) to keep one at 71 C. So, I think that the lower TDP of the G0 is not a result of a cooler CPU, but instead is a result of a CPU that is designed to run at a higher temperature.
If what I suggested is totally wrong, please correct it.