I had the chance to open up a 15" 2017 manufactured in October '17 (info from its serial) and I noticed a shorter cable than my same unit manufactured in March 2018.
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want to put the nail in the coffin? contact ifixit and send them both laptops and let them measure and photo both side by side.
wonder if the screens part no is different on either unit?
also geniuses - can some of you with access to replacement screens start measuring cables so we can start building a collection.