B&W vs PSB

I have had a pair of B&W CDM 7NT for years and have been happy. I have an opportunity to pick up a pair of PSB Synchrony One's. How much of an improvement should I expect?
I don't know about the synchrony ones but I auditioned the twos and they were great.
The PSBs will trounce the B&Ws. You will have to go far up the B&W line to get comparable performance. You can use a less powerful amp as well.
Looking at the specs for both speakers, it's important to compare but of course listening to both is vital.

PSB Synchrony One B&W CDM 7NT

30hz to 20,000hz 40hz to 20,000hz
90 dB sensitivity 90dB sensitivity
4 ohms nominal impedance 8 ohms nominal impedance
full range speaker 2-1/2 way speaker

So the PSB will need more power to drive it because of its 4 ohm nominal impedance vs the B&W CDM 7NT at 8 ohms. The PSB will go lower in bass ext vs the B&W. THe PSB is a full range speaker vs the B&W being a 2-1/2 way. So as long as you have the extra power, the Synchrony One will be superior to the B&W CDM 7NT.
JA in the latest Stereophile said he could live happily with the Synchrony One during the review of the Magico V3 at many times the One's price. Here's the Stereophile review of the Synchrony One: http://stereophile.com/floorloudspeakers/408psb/
$2,000 (B&W CDM 7NT) vs $4,500 (PSB's). For that price difference I should expect a significant improvement.
Thanks all
Your feedback is what I assumed I would hear. I should have also asked if you all feel the PSB's would be good in a Home Theater application as well?
They should do very well in a HT, even without a sub. If you're going to be using a high quality sub, I'd save the money and consider the Synchrony One B. The One B + sub will give you a better full range speaker system.
The PSB is the much better speaker over the B&W model in question as it should given it's price. We are loving the Synchrony's here in the showroom.