Newbie Question: Multiple Tri's and training

1st post, so be good.

I am planning on doing my first (and second) triathlon this summer. I have been training for the sprint (june 3)by using the sprint 12 week training plan. I am ahead of schedule by a couple of weeks. about 8 weeks after the sprint, I plan on doing an olympic (july 27th). My question for you is should I start incorportating some of the Olympic training now, or wait until after the sprint?

Thanks in advance.