ROCOR since 2007 has had the status of a Semi-Autonomous Church within the Russian Orthodox Church, which means that ROCOR is empowered to make many of its governing decisions on its own, though some decisions, like who should be the primate of ROCOR, need the approval of the Russian Orthodox Church as well.
I assume by the second Russian Orthodox structure outside of Russia, you probably mean the American Metropolia. That structure was given a tomos of autocephaly in 1970 by Moscow, which means that since that time, it has been able to elect freely its own primate without receiving the approval of the Russian Orthodox Church (as opposed to a church which is autonomous or semi-autonomous which must have its decision of primate approved by some other Church).