[Brightcolours]

There are two things: the refresh rate of the LCD (like your computer screen, maybe 50 or 60 something else Hz, with LCD screens you don't notice the difference that much. And there is the rate of the video feed, comparable to movie videos (maybe 24 or 25 frames per second, or 30, or 60?).

I am sure the R5 performs exactly the same when you set the view finder to 60 Hz, also with BIF? Just a bit odd that it is not in the Nikon specs.

 Yeah right ....... what's the difference? .. light goes in the lens front and you gaze admiringly into the back top hole ....... and bingo you get pictures ...... I mean  ...... "how sweet is that"?  

 ........ as for refresh rate ...... I don't know about yours, but mine is around two pints an hour ...... not counting the froth ...... but then who's counting ......?   

..... notice how I didn't rise to the bait  ? ........

I don't get your post. Anyway, the difference is, you can watch a 24 frames per second on a 100 Hz refresh rate screen, and have a good time. But a 24 Hz screen would give you a flickering headache.