Dhamaal >> Any housefull movie ever.
Double Dhamaal was really bad, but that was because they couldn't match Dhamaal, so they have smartly did 2 things.
1.) Got bigger names while keeping most of original cast, and mixing it up
2.) They are shaking up the genre by adding adventure factor.
Besides Dhamaal still has value due to fist one.
Housefull is changing genre too, but other then that, not much to be excited off, first one was entertaining but not tgat much to hold that value, in short Housefull is stagnant whereas Dhamaal is looking fresh due to shakeup.