Which of the thermal pad and thermal paste is effective?

A：
Both can be used for heat conduction. The thermal pad has a certain thickness and elasticity, which is suitable for filling and conducting heat between the heating element and the shell. Thermal paste is suitable for heat dissipation scenarios with heat sinks. However, whether it is a heat-dissipating silicone sheet or a thermally conductive paste, the thinner the thickness of the molding or the thickness of the coating, the better the thermal conductivity.