the choice for these implementations is completely independent of eachother. The DisruptorCommandBus is a high-performance implementation that uses a RingBuffer and is restricted to Event Sources aggregates. Repositories must also be created/obtaines via the CommandBus implementation.
The DistributedCommandBus connects CommandBus implementations on different VM’s (which may be Disruptor, Simple or any other type of CommandBus), so that they act as one. This could be a choice for connecting the different MicroServices together.