Ozzfest, there's nothing like it is it?  What was it like to se SOAD there?
Seeing them live was an awesome experience. They had videos playing on huge screens and it synced with the music being played
Wow!  Have you been going for many years?  System of a Down at the 1998 Ozzfest was one to remember.
I went to a lot of concerts. The best one may be the Hatebreed concert when they filmed thier first DVD in Detroit Michigan. 
You're very fortunate!  Was that the one at Harpos Concert Theatre?
Yes. Harpos theater. Drove to Detroit from Chicago and stayed in a hotel. Had VIP passes for after the show. Great experience
That's something you'll remember for the rest of your life!  Who do you think is better, Hatebreed or System of a Down?  I think they both played at the Ozzfest in '06.
Both bands are different in their own way. Comparing them is similar to comparing Apples and Oranges,it cannot be done. 
Well, you can compare them though can't you - even if it's just saying one grows on an apple tree and the other on an orange tree, haha!  Seriously though, if you had to pick between them as the greatest group of all time, who would you choose?
System of a Down. Theyre more diverse and allow for a wider acceptance of an audience.