Which is more important - exact match on two pages with slightly similar content or completely unique content but no exact match?

[DigitalMarketingSEO]

I want to rank for two terms - one is the abbreviation and one is the actual phrase (think UX and user experience). Is it better to create two separate pages to benefit from the exact match keyword (given that the content is 51% unique) or should I work both the acronym and the phrase into one page?

If I made the two pages, I could get in a lot more longtail keywords, however it's my belief that I should make one really robust page to ensure all possible link equity and user signals aren't split. Is this a valid argument or does the power of exact match keywords override the need for user signals?

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