NASA Genelab or Cosmos Biomedical?

Hi,

I got into NASA Genelab training program (Space biology) for the summer. It is a program that lasts for three weeks, and they take school nominees and then further pick to see who can go. There were fifteen chosen.

The other program I got into is the Cosmos Biomedical program, which lasts for four weeks. Each class has about forty kids, I think?

Which program would be a better learning experience and impact for the future?

Do you mind me asking what your involved in/what your grades look like? I got rejected and want to know how I can improve. Thanks!