Because i'm a numbers nerd & if the numbers are wrong in my head it will be the reason i'm riding so badly

I whacked the geo numbers into this calculator.
Compare different bicycle geometries, calculate unknown geometry numbers, or calculate your geometry numbers from simple frame measurements with the Online Bicycle Geometry Calculator.
calculator.bike
As a reference I used the kenevo sl s4 & it calculated the wheelbase to within 1.8mm of what specialized quote.
The med rogue wheelbase came out at 1255mm vs the quoted 1265mm
The large rogue wheelbase came out at 1278mm vs the quoted 1300mm
So now Im scratching my head as to the discrepancy. Hopefully be able to run a tape-measure over one in the near future.
The only way I can make the numbers work is if they are measured at sag where chainstay grows 10mm & the supposedly 450mm chainstay has already been factored in for the large despite the chart saying 440mm still.