Hello,
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BA and BS are equally rated in a way. But to go in depth. BA is little bit easier when compared to BS. BA is purely a subject which deals with arts and you won't be having any other subjects till your last year.
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Now,Bs is a subject which deals with science as well as with arts. It needs a lot of concentration and the syllabus will be more in depth. You will have more subjects and more career options with BS.
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So, if you think night is too big to complete then BA suits you and if you want a brighter career options go for BS