The main difference between FCL (full container load) and LCL (less than container load) is the amount of space that is used in a container. FCL is used for larger shipments that can fill an entire container, while LCL is for smaller shipments that cannot fill a full container. Choosing between FCL and LCL depends on the size and volume of the shipment. If you have a large shipment, FCL would be the more cost-effective option as it allows you to fill the entire container and avoid sharing space with other shipments. However, if you have a smaller shipment, LCL would be the more suitable option as it allows you to share the cost of the container with other shipments, making it a more cost-effective solution.