B&W 702 Signature vs The original B&W 702 S2


Bowers Wilkens newer 702 Signature Speaker built off of the 702 S2 series. Upgraded crossovers,cabinet, tuning,etc.
Has anyone performed a side by side comparison? I have the 702 S2 and wondering if the upgrade is worth the cost or just jump to the 803 D3.
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Has anyone here used the 702 S2's with a Krell Vanguard integrated amp? 200 w/ch at 8 ohms. Looking to replace my old Thiel CS 2.2s and wondering if these 702s would do it. I'm looking for a clearer, cleaner sound (stereo only.)