I never measure saddle fore-and-aft position to transfer to a different saddle on a different bike. Or even the same saddle on a different bike. Positions will be different if the bikes are different and thus I use the balance method to determine saddle position on each bike: I should be able to briefly remove my hands from the bars while pedaling without sliding forward on the saddle. After I have the correct saddle position, I adjust reach with the stem if necessary and then check balance again.