Has the B&W S805 actually changed from N805?


I visited a B&W dealer yesterday to check out the new S805 speakers. I told him I currently have the N805s in my 2 channel system. He advised me not to upgrade because the S805 are "unchanged" from the N805s except for the cabinet veneer finishes. I challenged him about this (based on my understanding) he asked the store manager for clarification and the manager agreed and supported the sales associate. While I appreciate his avoidance of a sales pitch for a commission, his info seems inconsistent with the B&W web site and many comments from people here on Audiogon. Many previous posts here have stated the significant audible improvement of the sigs over the nautilus, please advise. Thanks in advance guys.
mijknarf
Each "order" represents 6db/octave roll-off.
ie: 1st order crossovers have a more gradual blending between the drivers than 2nd, 3rd or 4th order crossovers.
This purportedly results in better phase response, but increases the amount of power sent to the tweeters.

Lower order crossovers can also be more susceptible to "lobing" effects and cancellations off-axis.
Snickelfritz: How 'bout in English! Now I know how my wife feels when I try to explain to her what a DAC is!! Just kidding...thanks for the explaination Snickelfritz.
Looking to upgrade to nautilus for ht and 2 channel. I would like to have s805 for fronts but due to cost constraints would need n805 for surrounds. My real question is regarding the center. The sig center is available in tigers eye only, or can I also purchase it in the red bird's eye? Anyone know how an htm 2 would blend with the s805? I use 5 channel for a good deal of my music and don't want crappy sound due to different drivers.

Thanks,

JWH