Reducing mobile network and device energy consumption is one of the main objectives of the fifth and future sixth-generation (5G and 6G) cellular networks. This paper studies the Base Station (BS) and User Equipment (UE) energy consumption in scenarios where many users demand the same content and broadcast transmission might be used. We present analytical models to calculate the energy consumption in unicast, Multicast Broadcast Single Frequency Network (MBSFN), and Single-Cell Point-to-Multipoint (SC-PTM). Furthermore, we calculate the number of users per cell from which SC-PTM or MBSFN help to reduce BS and UE energy consumption compared to unicast.