Manual starter vs Auto starter

ok just wondering whats the difference in these to because i called o’riellys and they have the same PN listed for both?

i’m wondering because i’ll be doing a auto to manual swap and need to know if i’ll need to change it

i don’t know if they are different or not but i so know that the fasteners are different. in other words, you will need a longer bolt on one side and maybe a shorter one or a stud on the other…

i can handle changing fasteners