I am assuming that you would have both...using your preference for notes, etc.?
I can't see how one could NOT have Word nowadays. Personally, MS Word for me. It would take me wayyy too long to learn wordperfect to make it worth it. I hear good things about it, but if I ever want to email a paper, share it, or do anything that required the actual file to be used by anyone other than me, I think wordperfect would make difficulties for me.