Reasons:
1. As people noticed both MLG and DH run at times that were bad for the other continent. So MLG cannot get my vote in that matter. Ok this point shouldnt be considered so no points given ;P
2. Vods. Missed almost all the games on monday and could watch them easy with vods later. Than we have MLG... Didnt see the finals of MMA vs Losira and when i tried to find the vod i only could find their previous match... Plus for DH
3. Interaction with the on site viewers. Well MLG has a slight advantage over DH Summer 2011 but..
Lets look at it from the other perspective. Due to the closeness of the people MLG coundnt cast the most anticipated matchup - the rematch of Thorzain vs MC.... So i would make it a draw with slight favoring of MLG.
4. Streaming of the matches.
Lets see. MLG - 2 streams with lots of breaks (for the celebrity casters...) sometimes even showing the same match... In all many games weren't streamed.
Now DH: 5 english streams, 1 german , 1 finish. Covering all matches and even some of the BYOC qualifiers. Perfect scheduling (well almost perfect. Who in the right mind puts Goody in a group with 2 other terrans that are known for their macro style...). All streams were true HD and free with instant vods.
And back to casters... There is no comparison TotalBiscuit & oGsMC > Tastosis.
Point for DH
5. Length of the tournament
Both run for 3 days. MLG has a slight advantage do to the fact it didnt finish on monday !!!
But on the other hand DH offered more to the players who fail their groups or BYOC#1. Both on sunday and monday there were additional BYOC tournaments (#2 and #3) that had some prices and more important the slots for the next DH.
Point for DH
6. Price pool
MLG - if you dont win it wont cover your expenses in going there...
DH - Hell im at top of western esports money ^^