Sound quality as same as note 4 which is quite loud but not so much
style and design is also same as note 4 in the back and in front it has nice 18:9 aspect ratio
features are snapdragon 625 which is old now should be 626 atleast
camera are in the back have 12mp and front has 5mp camera
physical led lights also avalible
redmi note 4 looks similar to the redmi note 4 from the back and in front nice look because of the 18:9 ratio
looks premium
miui9 out of the box
this phone is really awesome but not a great upgrade from redmi note4
do go for redmi note 4
go for it it will worth of money