Yup that was my take away from this for the most part you are talking about differences that will likely not be noticeable to the average driver IF you are staying in the same class of cam. These are all 108 LCA with relatively short durations so unless you are doing some sort of racing where you are trying to get some tiny edge in the class it does not matter a whole lot. The odd ball here is the comp cam and that is because it is moving up to a 110 LCA with a longer duration (254) and it moves you to the next class of cam which moves the peak HP and torque up in RPM the next level. The 819 is a 110 LCA so it moves into the same class as the Comp cams. The rule of thumb I have read about is that 20 ft lbs of torque is noticeable in the seat so you will be able to notice the difference at lower street RPMs between the 108 LCA cams and the 110 LCA class cams but between cams in each class you would likely be hard pressed to notice any difference behind the wheel.
