Can someone tell me what are the differences on the vocals between Dolly Parton's version of 'I will always love you and Whitney Houstons version?

this musical excerpt is an example of piano volume. (true) !

i got this answer from a really friend, and it was right.

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.