Who to target? Gronk or Hernandez??

[CSimmsSU]

12 team PPR. I have Gresham at TE which Ive been ok with but looking to add either Gronkowski or Hernandez. Owner has both of them as well as Pettigrew but is significantly weak at WR. Im looking to trade one of my WR's for either Gronk or Hernandez but who should I target? I feel Gronk finds endzone more but Hernandez see mores targets it seems and hopefully stays healthy.
Also which WR should I be looking to move, we start 3 WRs and I have: D Jax, AJ Green, Marshall, Victor Cruz, Holmes, and Deion Branch. Ideally would like to see if I can get one of the TEs for cruz, holmes or branch (any of these 3 WRs would become a starter for him). Thoughts?