Desktop dyno.............

I know several of you have the desktop dyno programs so I want to ask a question. Which would be faster, a 450hp 2800 lb car or a 550 hp 3600 lb car? Everyone knows that a lighter car has an advantage but big HP engines have the advantage on top end, such as the HEMI.
If you use horse power to weight ratio the 450hp 2800lb car would be faster. You need 580hp in the 3600 pound car to equal this ratio of the lighter car, but this is just one factor and I would bet on it. jysnflem