just tried to look at Amazon, found a Samsung J3 costing 6490 it has 1.5gb ram and 1.5ghz soc with 2600mah battery. this is so poor compared to Redmi4a. Samsung may give you a better camera but rest all features are better in redmi.
the reason for not going for Micromax is they are just selling China phones with their logo on it. they don't have any rnd or engineering department. I even doubt they release any updates for their devices.