Sportsman has one 2 piece bracket that is a 1 piece on the Pro, there is a difference in the pumps but the Sportsman deploys just as fast as the Pro, the Pros pump is supposed to be a little quieter. Sportman comes In silver, Pro comes in your choice of black, or white. You can get the Sportsman for around $1200 the Pro is around $1600. Sportsman is great for your average fisherman I went with the Pro.Siggy comes in a variety of colors and looks awesome when you match it to your boat(see pics of Phil Addisons boat). It is drilled to make it lighter and again has a different pump.1 holds the boat well and small waves dont bother it for larger waves you can buy an attachment to absorb. 2 would be awesome for sight fishing, 1 will let the boat pivot on it so 2 is needed to lock it down. 1 works great for me and I dont see spending the extra money for another.Call Rich, he will hook you up!