RDJ, I am surprised you have asked this question, unless this is for the benefit of all the noobs.

Seats first...always. Like previous posters have pointed out ---> take advantage of the added revenue from the increase in attendance over the course of 16 days.

It is the same cost over the same amount of time. There are only advantages in this because of the added revenue and you dont have the initial HUGE hit in cost for the full stadium since you spread it out over 16 days.