Looking at the screen sizes 42 and 47, I can see that this will have an IPS Panel(W950A has S-PVA PSA for better black levels). Plus, we'll have to see whether is it a frame dimming or a local dimming implementation.
These 2 things alone will decide its success/failure.
Yes, true I have also posted the dimming query to Sony Team. Initially they came back and told like they will put up this question to Technical team and they will come back.
Then, someone had called up and told me that only Sales team can confirm this. But, other Sony guy told me that no difference except display.