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Not quite the same Tripster, but this guy ran 50 up front then 45 in back:
https://welovemountains.net/teravail-sparwood-gravel-tyres-reviewed/ATR has cooler forks, not sure of clearance difference to mine though
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They certainly missed a trick not adding the mounting options on the standard AT fork. And I'm not spending £400 on changing it.
https://www.kinesisbikes.co.uk/Catalogue/Forks/Adventure/RANGE
Ultimately yes it doesn't really matter. Any width will work. And probably 23 to 25 difference is indistinguishable to a normal human?
But 50mm will easily fit your tripster.