Originally posted by liloatavs
I believe that people on this forum generally refer to all latest generation of Sony LCD RP TV sets as GWIII. As far as I know, XBR models (60" and 70") has not been actually released yet. Once it happens, people may have to be more specific in their posts. On the other hand, in previous discussions, people stated that the video engine (LCD chip, optics) on all GWIII are the same. XBR models may have brighter lamp (if I remember this correct).
The non-XBR GWIIIs are the 42WE610, 50WE610, and 60WE610.
If you saw one of these and didn't like it then it must have been displaying a bad source or really screwed up. JMHO.
The XBR GWIIIs are the 60XBR950 and the 70XBR950. Both are in limited release here and there with more general availability expected in late November. A couple of forum members have reported buying each of them, and have generally reported improved PQ and physical appearance from the WEs. There is a thread on this subject out there somewhere.
Yes, it does appear the two have the same light engine, but the XBR has a finer, higher-contrast screen and (perhaps) better optics that are apparently allowing it to put out a better overall picture than the WEs (deeper blacks, better contrast ratio, less screen door, etc.).
I don't know any of this for sure since I haven't seen one, but it is promising.