Browsing electronic medical records (Citrix EPIC): iOS vs Android tablets?

I'm looking to get a 7" tablet (nexus 7 or ipad mini) to study during downtime in the hospital.

Are there any physicians or medical students with experience using EPIC on the Citrix receiver app? Is there any difference between iOS and android with that application?

Have any of you bought major medical textbooks for the iPad mini (Harrison's, Schwartz's, William's)? Are they any good?

Also, I have a bunch of textbooks in PDF format - is the PDF experience good on iOS? I may buy the Papers app by Mekentosj to sync with my desktop Papers application. I highlight using Skim, so maybe dropboxing the PDFs to sync the highlights might be best.