Realme UI
The Realme 6 comes with Realme UI on Android 10, which is a departure from ColorOS and yet you still see some bits and pieces of ColorOS there - and I'll get to that soon. It also feels like the folks at Realme has taken some cues from OxygenOS for the UI too, and that's nice! There are some pre-installed apps that I don't use (and won't use) but there is no option to remove these - and in my books, that's called bloatware. It's the same everywhere. MIUI, EMUI, One UI and to a certain extent, even iOS. So it depends on your preference and how many of these apps you can live with! I will say though compared to the Realme 5's ColorOS, the amount of bloatware has been substantially reduced and there are no annoying ads that suddenly pop up when using these so called pre-installed apps (I'm looking at you, Xiaomi), so that's good. The interface feels cleaner and smoother, and coupled with the 90hz screen refresh rate, Realme UI is a joy to use. The fingerprint reader is on the power button, which is a first for me - I've never had a phone with a fingerprint reader in this position before. It is however easy to use, fast and accurate. Being a right-hander, I registered my right thumb and my left index finger based on how I would usually hold my phone and it works great. In terms of customisation, there are plenty of options and settings too, so it's a bit much to go through everything.

https://forum.lowyat.net/index.php?showtopi...post&p=96343397

Edit: I will add that Realme is very consistent with updates so far and in their August 2020 update, they added something called “Super Nightime Standby” - with this feature, my phone overnight idle battery drain is just 1% over 8 hours.

MIUI
As pointed out, while MIUI 12 is a vast improvement over previous versions, it still comes with a whole lot of bloatware. A quick search or two on YouTube and you will find that there are ways to remove some of these bloatware without rooting and that helps a lot! Background activity seems to be very inconsistent, I've gotten anywhere between 1% to 7% battery drain over 7 or 8 hour periods from 100% full charge - with all settings left on. In the second week or so, I installed Naptime and used it without root (just did some ADB stuffs) and it helped a little - but overnight battery drain still occurs every now and then. So all in all, MIUI remains a mixed bag and may not be for everyone, but I will reiterate again that the 12 is a big step in the right direction.

https://forum.lowyat.net/index.php?showtopi...post&p=98079276