My Lenovo k6 note is only missing custom LED notification colors. Other than that almost all Xiaomi Redmi Note 4 and extra features are present in it.
I can format external MicroSD storage as internal and extend internal storage for installing thousands of more apps and games.
Dual app profile is a good feature. Now I can open two of my FB accounts in dual "Facebook" app simultaneously on same phone.
Dual space is good for multiple users of same phone. Each user can have its own independent space and password protect that.
Additionally my phone has got VR mode.
I can find missed call ring duration too and automatically record all calls with built-in call recording feature. It also has got built in call /sms blocker and app locker too.
Well the look of Xiaomi Note 4 and Lenovo k6 note matches a lot and OS features are also similar. I suspect both companies have got some collaboration or may be they simply copy each others features.
Many of the features that are now found in Xiaomi Note 4 were there in even Lenovo k4 note. I have checked that.
Edit:
Lenovo k6 note is missing some camera features which I have found in Xiaomi Redmi Note 4.