Yes Lenovo K6 power smartphone is better than xiaomi redmi 3s prime whis specifications is similar not all but most part
Comparision and Specification
Lenovo k6 power
5 inch ips ( Compact)
Full hd 1080p display ( Very good dispay)
Snapdragon 430 octa-ocore processure ( No lag)
3GB Ram ( Good for miltitasking)
Dolby atoms dual speakers ( Loud sound)
Ear piece sound ( Good)
13 mp back camera with LED flash ( Better than redmi 3s prime )
8 mp front is also good
Fringerprint sensor ( Very good and responsibe)
Sensor it has all important sensor
4000 mah bettery ( Screen on time 7 to 9 hour medium to heavy usage)
Xaiomi Redmi 3s prime
5 inch ips ( Compact)
720p hd dispaly ( Good display)
Snapdragon 430 octa-core processer ( No lag)
3GB Ram ( Good multitasking)
Speakers ( Poor quality)
Ear piece sound ( Good)
13mp back camera with LED flash ( Not as good as k6 power)
Front camera ( Above Average)
Fingerprint censor ( Good and responsibe)
Sensor it has all important sensor
4100 mah battery ( Better than k6 power)
Price
Lenovo k6 power Rs.10000/-
Xaiomi redmi 3s prime Rs.9000/-