No sir... they are not
Superduty will have an indent on the area where the Harness goes through the cover in the center...
OBS has them front and rear for the same respective item
Hoping to find a decent non-bent set... I might have them Chromed
I never knew about the differences other than the filler neck. I have a 95, would swapping to the newer style actually make a noticeable difference in sound? Also, if I keep my original valve covers, can I add the filler neck from an SD to my covers? That's been on my to-do list for awhile now, I just haven't ran across anyone getting rid of a filler neck