I am trying to find out what the differences are between these two showcases. Both are being held in the Northeast. The Sunshine is held in June: the Underclass is in August. Although I have searched this site for info on the two, I am unable to determine differences between them. Any insights are appreciated.

The underclass is for 2010 grads or later. The Sunshine is for 2009 grads or later.

From the best of my knowledge.
The PG Sunshine is more of a open invite for '09, '10 and '11
The PG Underclass is for 2010 or later and is a National. (more selective) Mostly players that have parcipatied in previous PG events or recommended by someone.