Both the courses are good you can choose the course according to your interest. CA may be more involved in taxation, financial management, project consultancy, auditing etc. Whereas CS is related to mainly corporate affairs dealing with statutory record maintenance, dealing with the legal matters of a company etc.
With the increasing scope in the field of Finance and accounts the scope of CA has been increasing. The Chartered accountant is a person who is involved in the job of auditing, accounting, taxation etc. A person will be accepted as CA only if he/she has passed the final examination conducted by the ICAI. Even in a small organization CAs are important.
CA have all round knowledge. It includes both theory and practical but CS includes only theory.
Good Luck!!
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