Stan,
Get the D-handle right angle Milwaukee, the variable speed one with the removable cord. Easier to replace, and you can get a 25' replacement.
The Hole Hawg isn't as easy to use in my opinion, bad ergonomics. Also the HH is heavier.
The HH has more torque, for sure. Important for a plumber or an industrial/commercial sparky who's going to be drilling a lot of holes for 3" to 6" pipe. In resi, the biggest hole you're gonna punch is for the service entrance mast--and only one per house.
