Why not just email them and ask if this is allowed. Better to get confirmation before frozen and confiscated money!
In many cases this is the obvious thing to do. But this one is tricky as they would refuse to comment on other company's policy (“yes, it's the same owner but two entirely separate companies...”) and remind you that an account holder can have only one address of residence registered.
Having all docs in place I don't think the confiscation is a real risk but account being frozen and unnecessary turbulences – yes.