Is OCLP clean reversable? What kind of Memory is being used, besides the SSD?

Hi, I have two original Macbook SSDs for the 13" Early 2015 Macbook Pro and i wanted to try out OCLP for comparisen. But some Information i wasnt able to find.

The Installer is using the SSD, is it using any other memory of the macbook?

If i just switch the SSD's back, will the original os work normally? Will there be some permanent changes or leftovers in the system?

All the Build Settings were default.

I was looking a bit around online and i couldnt find an answer.

Author: @yohankun