Anyone have any insight as to why the 3 generations of s2ks have different coil pack part numbers

Ap1 ~ $105
Ap2 ~ $52
Ap2 dbw ~ $78

Honda generally tries to reuse as many parts as possible, so why did they choose to use 3 different parts?

Does it have anything to do with the valve cover since ap1, ap2 and ap2 dbw are all different valve covers? Or is it purely the electrical requirements?

 

A thread from years ago https://www.s2ki.com/s2000/topic/819...-are-the-best/
This thread show the visual difference in coil packs..
https://www.s2ki.com/s2000/topic/844...s/page__st__50

 

I'm aware of this thread

I was more curious if someone had done an extensive profiling of the different coil packs as to their electrical performance

Honda has a tendency to supersede antiquated part numbers so that if they could stock just 1 part that is backwards compatible with earlier parts they would.

As noted by billman, the service manual specifically says do not interchange AP2 DBW coil packs for AP1/Ap2-non DBW

 

I used the $52 ones on my 02 AP1, no issues. I can feel they're better than the old AP1 coils

 

Ive ran both AP1 and pre 06 coils in my F22c motor...The other thread I posted did show that the RSX packs are "better" in performance