Spectral efficiency comparison table is a chart used to compare how much data different types of radio systems can send in a given amount of time. On the table there are two columns, one for a type of radio system and one for how much data it can send per second. This can help decide which technology is the best choice for a particular situation. For example, if a radio system needs to send a lot of data quickly, then a system that is more efficient would be a better choice.