I like the Sargent seat because it is larger and flatter in the back of the driver portion. Also the area near the tank is not as wide as the OEM seat, so it helps me to get a better ground reach.
IMHO it is much much much better than the original seat, but it's not perfect for me. My butt still hurts after a long ride, but instead of 45 min with the original seat, I now get 4-5 hours. While I can ride more, I find I have to move more around the saddle to change the point of contact. Please note that it is the beginning of the season for me, I'll bet that those numbers will increase with the mileage.
BTW, Sargent offers a 30-day money back guarantee, so you may want to test it and see for yourself.