I can confirm it does, indeed, work! IF you are using the same cores in both your emulators.
For example,
NDS4IOS uses
DeSmuME, which is the same as the main Nintendo DS core in OpenEMU.
(to check which core(s) are loaded into OpenEMU, just go into the OpenEMU preferences)
So I moved the .dsv file of my game from
NDS4IOS into the save files folder of the core of OpenEMU.
In the case of DeSmuME, it's in:
Code:
/username/Library/ApplicationSupport/OpenEMU/DeSmuME/Battery Saves
Then I just booted the game in OpenEMU and bingo!