A:Answer I have never looked at a 900F so I can't compare. I probably read the same reviews you did of the earlier high-end model with the xwide angle filter having lighter contrast level. I have the 75" 950G and I think the picture is exceptional. Blacks seem deep black to me at least. I had the 65 inch for awhile and decided I liked the picture so much to return it and get the bigger size. I think the 75" looks just as good color-wise. I don't think the 75 inch is as bright as the 65 inch but it is still very bright and bright enough. If I stop to look for defects in the picture about the only thing I can find is that all of the extreme corners of the screen are just a bit dim.
I was also considering the Samsung Q90R but I haven't seen one yet. I have a feeling the panel itself is nicer on the Q90R. I ruled the Q90R out because it is $1,500 more, doesn't have Dolby Vision, has a cheaper remote and Bixby instead of Android TV. How ironic that I love my Samsung Note 9 phone running android, but they decided to go their own way with Bixby here!
Anyway, I'm happy with my choice - and at the moment, I would make the same choice.