They all do the same thing........
Bottom line is personal preference. Neither gat is better than the other in my opinion. They are all high end markers.
Get to a field....ask about, have a go on a few and make your own choice. Its your hard earned and you that has to shoot it so only you can really decide
Personally I've mostly preffered egos as they are reliable in my experience and have never let me down. But I also like Dms aswell...
Seriously though....try a few out if you can, before you buy. Best way to make your choice in my opinion anyway.
-ChEf