You will notice their are different opinions here about the various firmware versions, so you will need to test each one to see what suits you.
Version 2.6 is a members 2.5 modification firmware and includes a HDR timed switch. Those that use it seem to drive many night hours which is where reading oncoming number plates is more difficult. For me, 2.6 made little difference as my 2021 car standard LED headlights have a different beam pattern to halogen or similar and completely wash out UK plates.
I rarely drive at night so I've been concentrating on the best daytime experience.
As you've noticed, my priority is the ability to produce the best freeze frame and 1.03 does it for me.
Stock firmware v 2.0 and above, for me, produces slightly blurry images that I blame the switch from WDR to HDR, even though on both I have WDR/HDR turned off, but that's another story.
There is also a mod 2.5 firmware available, from vvs I recall, that increased the colours and was very good in daytime video.