I have the Apex combo iron set P-8 are Apex pro, and 7-4 are Apex CF16. From your OEM sheet, it seems Pros come with tapered, and CF16 come with parallel tip shafts. Do you know which shafts Callaway put in the combo sets?
I do not know for sure what Callaway does on a combo set like this with the shafts. This would be a question for Callaway. On the our OEM Replacment list I had the XP 95 as the steel shaft in the CF16 irons and the Project X for the Apex Pro’s. Which shafts are in your combo set? That could help answer the question.