Hi, I'm very interested in going ipad only in college and my question is there a difference between MS Word and Excel when buying Office 2016 compared to the ipad versions in office 365? Are the ipad versions (office 365) inferior to the laptop/desktop versions (full MS Office)? I'll be using them for research and would like to know if I can go ipad only. Thinking of buying an ipad pr 12.9 instead of a Windows laptop. Thank you!