Are the shocks on self level and standard the same?

[conedoctor]

I was wondering if the shock itself is the same, I understand one has a coil and one has a bag.

I am exploring the self level conversion and I don't know if I can just swap my springs for bags, I want to think the mounting for the bag or spring would be the same for ease of production.

I may not go the whole way but just run bags and adjust pressure when the trailer is on.