i think the seats are identical to those used in previous years. just different fabric and no drivers arm rest.
hmmm, my butt hasn't noticed after 3 years in my 08/09 seats and 3 months in the 11. the rear set up is definitely different. not sure if a rear 11 will match up or not. there is no plastic "shelf" under the rear seat, now there is carpet visible under the rear seat.From what I read, the bolsters are larger also.
Canada Edition buddy
Clazzio thinks there is a difference with the 2011 xb seats. They came up with slightly different set for the 2011's.
You could check with them for details.