Well, everything I have read says that deca is better than eq. However eq has fewer sides, and less chance of seeing those sides.
Personally, I doubt there will be a huge difference, and would go with which one you want. Also, if your joints hurt you, that would make me want to go with deca.
But you will find some neat things in the searches. This gets asked quite a bit, so you won't get responses from some of the more knowledgeable posters. The only way to get their answers would be to search the archives.