Ok, let me explain what the other guys was trying to explain. Yes it does make a difference. It depends on if you want to stay in the base.

Vacancy bid happens first, one would presume the 737 guys see the bump coming, and no one bids the 320 vacancy. Therefore, other guys more junior will get bids into the IAH 320 base. If they are more junior, then more guys off the guppy will be able to use bumps into that category. Does it make a difference, maybe not in the long run, except for freezes.

This won't prevent possible secondary bumps, but my guess is that manpower has already planned some of that in their forecast. And, if the 320 is growing that fast, in addition to used 319's purchased, then it is possible there would be no secondary bumps at all.

Sorry if I am presuming the obvious. It will have the effect of some leveling of past out of seniority bids.