No, the Cine 9 is a completely different beast, a complete redesign from the ground up. Yes, the 1209s will be far less than the Cine 9s.
Cine 9 is a digital chassis, meaning that all convergence. geometry, etc waveforms are completely digital right to the main output stage. That means less drift, more stability.
Tubes are LUGs along with HFQ 900 lensesm sharper than the GT 17s.
The chassis is completely redesigned, the video circuits are on one side of the set with heavy shielding, compared to the older Barcos where they are between the power supply and H and V boards, where they pick up more noise.
Massive convergence/color/focus/etc adjustments, moreso than the G90 I would say. I personally have never spent a lot of time tweaking a 909 to the fullest, but it is an amazing set.
(I got this from a Barco tech that I talked to a month ago, a very knowledgeable guy. He loves the 909/Cine 9.