The one on the left is a rotary barrel pump. It is designed to fit 15-55 gallon drums. The one on the right is the traditional old fashion lever water pump. Both can be purchased from Harbor Freight tools http://www.harborfreight.com for about the same price.
Both pump about the same amount of water for a given input energy. Both were new and were not broken in when I test them. They were stiffer than normal to work. Both needed priming with water before they would pump water.
Comparison of Two Types of Water Pumps
