Dear student
CSE: computer science engineering is involved in many aspects of computing, from the design of individual microprocessors, personal computers and supercomputers to circuit designing and writing software that powers them.
IT: Information Technology deals with the use of electronic computers and computer software to store, protect process, transmit and securely retrieve data. IT professionals perform a variety of tasks that range from installing applications to designing complex computer networks and information databases.
In simple words, CS engineers create and IT engineers use it.
No branch is best or worst. Every branch which is being taught has its requirements in the industry. It depends upon your interests to join the specific branch. You can compare the subjects of both the branches and see for those subjects in which you have interests in. Choose that branch in which you can work passionately.
Hope this helps
All the best!!!
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