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

There are a number of variables that should be addressed also.

Stock suspension? Why does the other car weigh so much more? 800 pounds on the front of the car is going to more adversely effect ET than the same weight distributed evenly. Gearing?

Additonally, peak numbers mean jack. Under-the-curve horsepower is what gets you to the stripe quicker. Which is quicker through the quarter? A stock 225 hp Camry, or a stock 225hp Mustang?

My guess would be, given two real world cars, that the lighter car would be quicker.