I tested previous firmware based on Android 7 later. It was Xiaomi.eu 8.5.3.0 (as I remember). It was also stable but I was not satisfied with the battery life. I've updated to this firmware from old xiaomi.eu 8.1.6.0 and I very like this version.
I installed this ROM yesterday. What can I say? Yes, this is very fast, even sharp. About battery... It seems that no drain, it is stable. No wakeups at night. I continue to test :)
Could you please write a small report about differences and your feels about both of these ROM's? Which ROM do you prefer? What about battery life and etc...
Thank you in advance :)
I upgraded from Xiaomi.eu 8.1.6.0 to 8.5.2.0 two days ago. For my feelings this version is good and stable but bug with blinking track in keyboard is awful!