CQRS/Event Sourcing design pattern question

gistfile1.java

public enum Mode {
  GROUND, AIR, OCEAN;
}
// *** GENERIC STYLE ***
// 1 command to set the mode
public SetModeCommand {
  private final Mode mode;
  // constructor, getters, etc
}
// handler:
public handle(SetModeCommand command) {
  eventBus.publish(new ModeChangedEvent(id, command.getMode()));
}

// *** MORE SPECIFIC STYLE ***
// alternative:
// 3 commands, each to set the mode with a hardcoded value
public SetGroundModeCommand extends AbstractSetModeCommand {
  private final Mode mode = GROUND;
  // constructor, getters, etc
}
// handler alt 1:
public handle(AbstractSetModeCommand command) {
  switch(command.getMode()) {
    case: GROUND {
      eventBus.publish(new ChangedToGroundModeEvent(id));
    }
  }
}
// handler alt 2:
public handle(SetGroundModeCommand command) {
  eventBus.publish(new ChangedToGroundModeEvent(id));
}
public handle(SetAirModeCommand command) {
  eventBus.publish(new ChangedToAirModeEvent(id));
}
public handle(SetOceanModeCommand command) {
  eventBus.publish(new ChangedToOceanModeEvent(id));
}