You still left open a whole lot of variables. If the wind is the same, how hard is it blowing? Some boats perform better than others in lighter winds and some in higher. What kind of seas? Flat or chop? Some boats handle chop better than others. The closest thing that you are going to find with an unbiased answer comparing boat for boat is in the Portsmouth tables. The lower the number, the faster the boat. It's not perfect, but it's the best thing we've got.
Don