i have been also using xiaomi.eu stable 188.8.131.52 for almost 2 weeks and i'm happy with it. also using FHD res and 60hz and my accubattery says 9h, playing youtube videos, asphalt 9, and normal browsing and social.
One reason for choosing a ROM is obviously the region one lives in. But there are other possible reasons for going with a ROM from other regions or sources. I have tried almost all available ROMs (which I know of...) on my Mi 11 ultra which is originally CN version. I wanted to know which ROM is the most popular among the masses here...!
I prefer the EU ROM as it is updated as the Chinese is but it still keeps the mi dialler and SMS app. I couldn't get on with the Google versions. Also no call recorder on global. Well there are loads of differences, the EU has the best of all versions. Some people find it slower than stock but as I don't game with my phone, it's good for me. I had the 10 ultra too and used Chinese and then EU on that too.