English literature is the literature written in the English language

English linguistic is a scientific study of language.

So, the similarity in just in language; English. The method and strategies are different.!

On the one hand we study the material written in English like novels, dramas etc And on the other hand linguistic is the study of language's inner part. How it could be composed, how we use different words, how we use to speak it, how different sound could be produced.!

I hope you got it.

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