I say this for everyone that asks about pieces at this level - post an audition room recording first and then I'll know if you're really good enough for these pieces. I want to hear if you can play the FI or Granados well or are just playing the notes. Not to question your skill, but it seems like lots of people just want to brag about things they can't do.In the meantime, I'd say try it and see if you're capable. That's the most effective way. Also, see what your teacher thinks about these pieces.