There should be no difference. I would suggest trying again just to be sure.
There are little quirks like if you arm/disarm values it resets all the other values. So it might be if you armed Y, changed Y, armed X, changed X then it will have reset the Y value when you armed X and you did not notice - or something like that. I do X and Y all the time - and wince when I realize I missed arming one value (so have to set it all up again).
And reading back to your original question of hold to hold the final new Y value, in case not already obvious, you may need to drag the right edge of the take out past the end of the scene for the new Y value to stick until the end of the scene. As soon as the take ends, it will revert to the default position. So its very common to do a short recording and then extend it out.
There are also keyboard short cuts to create a one frame and two frame recording without starting the “record” button, but I find to drag these out you have to zoom right in before you can grab the edge to drag it out - so I end up never using it - I just always hit CTRL-R and do a recording for a full second or so, then drag the take out longer to whatever length I need.