Screen Resolution in Samsung j7 is 720*1280(around 282 pixel per inch) in redmi 2 prime has(312 pixels per inch) resolution is high due to screen size is 4.7 inch in redmi 2 prime on other hand Samsung J7 has 5.5 inch display(too large)
screen size is also bigger as compare to redmi 2 prime, might girls having trouble while handling
for those who wants better picture quality don’t go for J7
sound quality is good. at speaker is also good.
redmi 2 prime is more covenant as its UI is more easy to use than Samsung UI.
in terms of style all Samsung phone is looking like same no more change in design.