I would think that your base question would be hard to answer. The reason being is that you can get most/all the models in either a straight, backset or string follow configuration.
While the number of laminations can vary by model, as has been mentioned you can add lams.
I have always had a problem (in my very weak mind) with the way HH names their models. The wood (and to a degree the number/type of lams) determines the model. You could find two of the same "models" that have the same poundage specs, same length, but one is backset and the other is string follow. One is 4 lams and the other 5.
They certainly would "feel" different.