Not a fan of these type of reviews, which may not be very accurate, but its just to show the latest TouchWiz speed, as most of people say its slow and laggy.
Chinese branded phones are usually faster than Samsung phones, but most latest Samsung phones have excellent battery timings, as they are made sufficiently fast (not ultra snappy like Chinese brands) for better battery life.
Most people compare snappier performance that Chinese branded phones offer, but the best way is to compare their performance vs battery timings ratio.
The latest TouchWiz is the lightest and fastest ever built to date. It performs pretty fast even on budget phones.
Galaxy A5 vs Galaxy J5 speed comparison.
https://youtu.be/0lQnS3aiCYE
Galaxy S6 vs Galaxy J5 speed comparison.
https://youtu.be/0lQnS3aiCYE
Galaxy S6 vs Galaxy J5 Display comparison.
https://youtu.be/SjjOAnZWJnU
Galaxy S4 vs Galaxy J5 speed comparison.
https://youtu.be/PVPCytU36Rc
Galaxy E5 vs Galaxy J5 speed comparison.
https://youtu.be/jId2199sN3c