First, I am not sure if this is even ok to discuss as there are many sponsors here.
Second, you can easily look at the various sponsors sub-forums to get your answers.
Third, unless one saw lab tests from each it is fairly subjective.
Fourth, there are some who like to bash or rave strictly to support their own self interest so hard to get truly unbiassed information.
Finally, I doubt any one person has tried everyone and could give a comprehensive opinion on all.