I went from an '05 Range Rover to a '14 Pan GTS and nobody in my family has ever compared the two ride qualities ill-favorably. The GTS in comfort mode is taut just like any newish German sedan but not distinguishable from the RR, which is reputedly one of the finest rides known to modern butts.

 

With PDCC it won't be unsettled. You'll be locked in during the twisties, and with less unsprung weight due to PCCB.