What could it be in chipset, kernel or software that slows down points for nexus and other phones for example using same processing chips?
Qualcomm has all ram, wifi etc and gpu integrated in one?
So xiaomi has dong decent job if scores are way to decide.
Well, the difference could be because newer versions of miui are a bit more resources demanding. A benchmark should be done on a just installed system without any modification apart from the benchmark app.