What is a 'case study' as used in sales copy, and how does it differ from a standard testimonial?
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A
A case study is shorter than a testimonial
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B
A case study provides a detailed before-and-after story with measurable results, while a testimonial is a brief quote
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C
A case study is written by the company, while testimonials are always third-party
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D
There is no practical difference between them