Just a normal security update. Security updates don't change anything, only major updates like 6.1, 7, etc. change the look and feel of software. Security updates only fix some Security vulnerabilities in device software.
This is not a security update or system applications update If you notice that animation and app opening time is bit improved and also closing and some other small improvement Normal user not even notice So, update your phone because if you dont update . Then you dont receive one ui 7
