iPhone 5s: Which consumes more battery, 4G, or 4G LTE?

Under Settings > Cellular, there's an option to enable/disable LTE. When disabled, my phone reverts to 4G, as indicated by the icon in the status bar. I've read elsewhere that using 3G causes greater battery drain than 4G (in fact, Apple's own iPhone 5s spec sheet indicates that you only get 8 hours of 3G data, versus 10 hours of 4G LTE data). Which leads me to the following line of thought... If I disable LTE and revert to standard 4G, what is the effect on battery life?