To see if they are compatible, only way is to open both .VAL files using S3D and compare...
Never used any of them so can’t tell. But I suspect Rubini use .VAL to make life boats appearing for each ships while the NVDrifter use .VAL for each ships to behave the new waves…
It’s only hypothesis from me so take it with care

Anyway you’ll have to add the Right values from one to the other To make it fully compatible