Hello Dear,
Bachelor of Science in Computer Science (BSc in Computer Science) is a three-year undergraduate degree programme whereas Computer Science Engineering (CSE) is a four year undergraduate programme which includes the study of design, computational processes and programming languages. If we talk in terms of scope then computer science engineering has higher scope then bsc computer science. CSE students are exposed more to technical knowledge and expertise.
You can check out the links below for complete details about both the courses:
https://www.careers360.com/courses/computer-science-engineering-course
https://www.careers360.com/courses/computer-science-course
Good Luck
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