Inceptus,

The only advantage that I am aware of is that the knowledge of the disparity between the exchanges means that there will be a correction (with the exception of news). In other words the QEC shares on the OSL should decrease in value tomorrow to match the value on the TSX. Tomorrow however, I believe that the Q2 is due to be released. For this reason, a correction might not be seen and it might be the TSX moving to match the OSL. Depends on when it will be released.