I've driven my wife around on the wide seat and the narrow seat. She liked the wide on the XC but she prefers the narrow seat on the XR.
The wide seat put more pressure on the back of her legs and made her legs fall asleep after 2 hours. 6 hours straight on the narrow seat and her legs were fine.
To make a crude comparison; you can get the same symptoms from sitting on the toilet too long...
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.