New beta firmware 7.1.3 released

[Hifi_swlon]

so lets assume we all are experienced listeners. What could cause our different results ?
I use an 800 via AIR / Wifi and SAM and I clearly prefer 7.1.3. Maybe we can find what those have in common who like or dislike the new version. For me it is exacly the opposite of what flyer and xlrxlr wrote...
Or maybe a new power supply programming is causing some speakers to sound better and others not.

My guess is there are so many variables - not least, aside from the kit, each individuals ears - that this would be a tricky one. My guess is any change that's more than remotely subtle is going to disrupt some people as they might have their systems in perfect balance, or like me perhaps be riding on the edge of an issue- like brightness- that a new sound could push over the edge. Of course, it could just need a fair bit of time to adjust.

Did those that prefer the new firmware perhaps feel that their systems were very slightly lacking in treble emphasis /clarity before, and sounded just a little tame? In those cases, even if it were subtle, a firmware described as the current one has been could probably just swing the system into perfect balance?

How different do the different models sound? Has anyone been lucky enough to hear them all the way up to 800 in the same room and same source/speakers? Maybe that alone is enough to give a diverse view?