You got it! So this is going to be part awesome and part disappointing, mostly depending on your use case.
So prior to this map street name test you requested, I noticed that when I was in 120hz doing the UFO test, the 120hz UFO and the 60hz UFO looked identical when BFI was turned on. This means instead of 120 black frames being inserted in between the 120 frames thrown at the TV through the HDMI cable, instead, the TV darkens 60 of the video signal's 120 frames. That's the disappointing part. After doing your request, it became apparent that, unfortunately, there is literally no distinguishable benefit from BFI if you're running a 120hz signal.
The good news however is two-fold.
First: Console gamers and 60hz PC gamers rejoice! You're getting a true 120hz equivalent of motion handling when maintaining 60 frames a second into the TV!
Second: Compared to the TV's listed above, the C9 easily wins. I'll explain exactly what I see next at different pixel rates.
Like I mentioned before, 60hz BFI and 120hz look identical for motion handling. This results in both of them having no blur whatsoever at 240px/sec.
Now, I'm sitting right in front of the TV, not at a distance, but I can easily read at 360px / sec. There is some fuzzyness though, as expected.
480px a second I can still read new roads I haven't read before, but there is absolutely some significant fuzzyness at this point. One or two roads are really tough to read, looking closely again.
600px a second, can still read most roads, but it's tough.
720px a second, most things are tough to make out, still possible here and there.
840px a second, really tough to make out
960px a second, nearing impossible to make out comfortably but still possible. Absolutely not possible at 60hz without BFI.
Just to make sure I was absolutely certain I could say 60hz BFI and 120hz look identical for motion handling, I looked at them both with 960px/sec just to be sure. They look totally identical. When turning on BFI for 120hz, the screen gets darker and literally does nothing else. If I saw someone say this on a forum, I'd call them crazy, or poor eyesight, but it does absolutely nothing folks, but the 60hz BFI is fanfreakingtastic!