Bump for an answer from the brain trust. I have debated this subject in my own mind for a few years. I think the answer we may get is "use what the majority of your raid is using" and they are so customizable you kinda make it your own to fit your play style.
They are pretty equal and thats why they are both still popular. I'm sure we can be told a zillion stories how DBM OR Bigwigs have wiped teh Raid. People tend to QQ alot.