LBNL SULI Program vs. NASA OSSI?

<p>Hi everyone. My interests lie within electrochemical engineering & materials science.</p>

<p>I just got an offer from the LBNL SULI program. (I have 10 days to accept the offer.)</p>

<p>However, I am also interested in some of the projects at the NASA labs. My end goal would be to pursue my PhD degree .
So right now I am trying to decide whether I should contact NASA to haste the application process or accept the LBNL one. Which summer programs would increase my chances for a more prestigious graduate school?</p>