If you are in wide angle view I am not really satisfied with the ir coverage of the r-z one. It has too much ir power in front, and much less over 80°. But you can see it only when looking in rooms p.e. I your example with looking in the distance it´s not possible to be noticed.
But one thing is much more interesting for me. The ir night focus point problem of the zoom lens cams is wrong, dahua hasn´t released a firmware fix for it, although the problem and a solution is well know to there engineer.
Your night IR still picture is looking washed out like out of focus. Can you please have a look at the night focus point ? And how it changes after releasing day auto focus at night ir view? And then at daytime do the same thing. I bet you will be noticing the same annoying problem...
The day time pictures without sun are looking a bit too much WDR affected (flat low contrast), your WDR value is set above 20?
Dahua is promising a real technical breakout with 800m epoe @ 10mbit and 13W (or 300m with higher bandwith 100mbit and 25,4W) I hope this is not only theoretical
It would be nice to see some experiences on this feature. On the other side it´s a dahua only feature, so we are fixed on dahua epoe components. It´s non standard, nothing I really like. It´s maybe in the future after warrenty replacing parts being a big problem.