QUOTE(lunatique @ Feb 10 2011, 07:04 PM)
can anyone elaborate the differences of both ROMs to a DHD noob like me????
i'm looking for smoothness (no lag) and battery life
Well, both are more or less the same thing, since they each had the same battery life fixes and all. Its just a matter of the extras that the ROM chef included. In SGS language, both have the same lagfixes and basic improvements, just that the theme and extra apps is different. Head over to their thread to find out what the differences are

Both of these are popular because of its improvement in battery life compared to the others. Others like CM7 and MIUI are great, but their battery use still isn't optimized yet, and drain the battery considerably compared to others.
Some here have mentioned the latest Revolution HD has some battery issues though, so I suggest you go for the LeeDroid ROM for now
Just curious though, why choose the DHD over the SGS? I myself was considering both before I bought this.