Quote from kjsnow25:
I don't think you should focus on what pocket it is in, but what makes a better market. One of the exchanges bought one of the ECN's, and the other bought the other. The faster they integrate the technology, the better. First come first serve with a rational two sided market might be the best thing to happen to trading since the opening bell was ringing.
You're going to have to pay someone to trade one way or the other, might as well do your listed where there is no "manual intervention".