YEs thats what I did, had 4.31 upgradede to 4.41 in dev, but have left it a while so now need the orders etc from old, syncing with new and Im good to go.
Im guessing I could just run the upgrade again ??? but error 4.41 not supported.
Ill prob just get alt team to do it for me who did the original upgrade
I am in a similar boat, I just keep exporting , orders, order items, users etc and checking one against the other and have had no issues.
I will be moving to new site with different domain over xmas period (with a little luck) but assentially I have two sites that apart form appearance and domains mirror each other.