B&W Signature 800 Vs. the new 800D Diamond

Does anyone here has a chance to listen to the new B&W 800D (Diamond)? How do you like it and how does it compare to the 800 Signature?

The 800 Signature Red Bird Eye goes for about $13K and the new 800D goes for $16K. Which one would you rather take?

Thanks in advance for your advice

Huy