I switched from the 650 seat up to a 1000 seat and the 1000 seat is a bit wider and obviously taller. My butt felt about the same after say a 2 hour ride ( getting uncomfortable) but my knees were much happier due to the extra room. So be careful switching to the 650 seat because it will put more pressure on the knees.
Growing farkle list: Aux LED's on SW Motech Light Bar, Bark Busters, OEM Touring Screen, Bestem LED Top Case, Charging Port, DL1000 Seat, Madstad Bracket w/MP Cycles Windscreen, Pat Walsh Design Radar Shelf, Neslon Rigg CL-855 Luggage, Givi Engine Guards, Sargent seat.
Iron Butt Association Member - Qualified with 1,118 mile Saddlesore