I've been busy this afternoon!
Good news to share, too.
1: The replacement monitor came in a cleaner box (the little things eh...).
2: The replacement is manufactured in Feb 2022, my original one with the marks is January 2022.
3: The replacement has no marks at all! Although it came in the same retail packaging.
4: The fan on the replacement is the same noise as my original, so I can assume that all of them are the same for noise, although I am guessing many of you have slightly noisier ambient environments than what I do around my workstation. My PC is quieter than my laptop for reference and the monitor fan when it's been on a while is definitely an audible hum, which in its normal running temp mode is slightly louder than within the first 30-60 mins of turning it on in the morning for example.
5:
I did a panel refresh on the original whilst I went away and did some laundry and chores whilst waiting for UPS to turn up with the replacement.. Came back to find the line (quoted below from earlier) gone. So any image retention or lines you guys see on yours, do a panel refresh
Before:
After:
(the wave lines you see are just artefacts a digital camera pics up due to the off-sync from the camera refresh rate and the screen refresh rate so ignore that)
6: The factory calibration between new (left) and old (right) is quite interesting. Seems the replacement is a bit tighter still:
7: I kinda forgot before but I remember now why I switched back to 144Hz, in a specific scenario that I can reproduce any time, I notice flicker when 175Hz is used. In Photoshop if I open one of my black and white photos (remember the PS background canvas is dark grey), and then zoom in and out of the image, I will see flickering in the grey areas around the whole screen. If I switch to 144Hz, the flicker is completely gone doing the same thing. So looks like I can notice this after all and it's only at 175Hz, so I have opted for 144Hz and as 10 bit is available, just kept it at 10 bit because may as well. This is reproducible on both old and replacement so is definitely a vrr/refresh rate flicker as mentioned by many
around the web.
Other than that, perfectly happy!