This article is about 20 years old but the data is still good. I tested mostly solid flat tappet cams in my Coronet but then tried a hyd flat tappet as the last test and it was my favorite. It revved just as well as the solid flat tappet cams and was much quieter. The numbers were all close to the same but for some reason this cam just "hit the spot".

http://www.moparts.org/Tech/Archive/bb/Lobe.html