Low Flow and Dual Flush Toilets

Low flow and dual flush toilets, how are they different?
Low flow toilets or (low flush toilets) flush 1.6 gallons of water or less. Which means that a dual flush toilet is a low flow toilet. The dual flush toilet has two options for flushing, a full flush 1.6 gallons per flush and a half flush typically 0.8 gallons per flush.