Generally, you can have a 2nd installation by coping the whole CE folder but you will have to start that game from the local exe, not steam. I can imagine it won’t be more convenient than using bugle because of the mods. Bugle allows to save modslists and load them from the files. You can also create different restore points/backups so this can work better for you.
If you own Siptah and you are not playing on that map, you can use it as your testing ground since by default it has a different save/database than EL.
2 Likes