I went for Redmi Note 4 because:
its 2 grams light in weight
it has popular Miui interface which is contineously developed by mi team, unlike EUI of coolpad cool 1.
2 Gigs processor speed, unlike 1.2 to 1.8 of coolpad cool 1.
it has SD card slot
Has FM Radio
Battery 4100, unlike 4060 in coolpad cool1.
The only good thing I fond in cool pad cool 1 is its fast charging enable where as red mi note 4 takes 2.5 to 3 hours to charge fully. I was OK with Red-mi charging time and went for it. I always focus on features so chosen Redmi Note 4.