Different players. You are not going to throw Bouchard out 20+ minutes a night against the leagues best and be asked to kill 8 minutes of penalties, he will get killed. You are also not going to ask Ceci to be your main offensive guy, lead the breakout and run the power play. The three right D will likely all be situational players, and played to their strengths not their weaknesses. Some nights Ceci will have the second most minutes, heck maybe the most. Other nights he will be the lowest. At the end of the year, his minutes per game may be the lower than Bouchard, they may possibly be above Bouchard, but that will not designate one or the other as the second or third pairing. Barrie and Ceci have pretty defined roles to play, and Bouchard is likely to eat up all the minutes between those two roles, which will still be significant.