Well, the lobes on the cam dictate the lift and the duration of the primary and secondary intake valves. Lift could be modified if there were different roller finger followers used, but they are the same.
The duration increase means that the secondary intake valve lobe must be wider (in the direction of rotation), ie a bigger lobe. The height can be the same. I think that for 8 degrees of crankshaft revolution the lobe should be noticeably wider.
I guess a cam expert would know for sure, I'm only going off my own reasoning and the fact that I spent a lot of time looking at my cams and comparing them to the 3L taurus cams. I saw no difference between the lobes.
warmonger
