For those who have used both, do you prefer AVG or Avast anti-virus and why?

I’ve already read many reviews on the subject, and most seem to place Avast ahead of AVG on the free anti-virus list. But having used both, I still feel that AVG is better. Before I switch back though, I wanted to get the jellyfish input and your reasoning. Thanks!

For those who want to tell me that they never need to use antivirus because they have a – insert any OS name here -, don’t bother.