With more than 95 posts on 4 pagers it's clear to me that this will be an endless debate. Both are super mixers. And I guess everyone would like both of them available all the time for themselves if this could. You can't really compare to find out which one is the best, unless you have clear objectives what you like to realize with the mixer.
If its just sound quality you got to listen for yourself. Only you know what you like best.
If its about features, than there are many differences. Then it becomes a simple what you need question and how much money you got available.