I have used both the phones luckilly. It is a different matter that I have used my friends mobile and I have found out that the camera of k5 note is much better. Even I faced no heating issue while gaming which I had to face in Redmi Note 3 after 1 hour of gaming. So in my choice, I would prefer Lenovo K5 Note
Coolpad Note 5 is the better option compare to K5 note ,Coolpad Note 5 is a awesome handset which packs in quality elements. The built up of this set is very good for multitasking and high end gaming. Lenovo Vibe K5 vs Coolpad Note 5
Though both are great devices and have similar specifications but I am currently using Redmi note 4 and truly it is a fantastic device to go for, it has powerful processor, decent camera. massive battery and effective fingerprint sensor.