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gubhi
MCamb
Manufacturers are the worst for measurements, if they do supply them they are never right!
Even with sites like SJS that say they've measured stuff themselves I don't trust it. You can see them discussing discrepancies with manufacturer spec in the Q&A on this rim, https://www.sjscycles.co.uk/rims-tape/sun-cr18-16-x-1-38-349-abt-alloy-rim-silver-36-hole/ - yet I measured the rim myself and got a different result, which I then used to calculate spoke length and the wheel built up perfectly, proving their measurement was wrong.
I think items get revised or the machinery that's making it gets adjusted or the actual manufacturer changes so frequently that measuring stuff yourself is the only way to be sure.