Personally I move my most commonly used games to a dedicated gaming SSD drive, but it doesn't matter what drive you use.
Once you have moved it, you can create as many f12013 folders as you like, and just rename the folders you want to play with when you need to.
I use Game Save Manager, because within the software there is a 'Steam Mover' application that can move games to another drive. Steam Mover is a misnomer here, because it can move Origin games also, or ANY folder you want.
http://www.gamesave-manager.com/
What Steam Mover does is move the game folder to any other drive, and leaves behind a re-direct, a symbolic link (like a shortcut), which tells the operating system where the real folder is.
In the picture below, you can see my steamapps/common folder where my Steam games are installed on my gaming HDD (F drive). The folders that
look like they are shortcut links, are actually symbolic links to those games I have moved to my gaming SSD (X drive).
If I were to click on any of those folders, I would immediately go into the folder on my X drive, but to the operating system it looks like it's still the F drive.
If I now click on 'raceroom racing experience' folder, I am taken to that folder on my X drive, but look at the path in windows explorer, it 'thinks' it's still on F drive (circled red).
Here are those games that have been moved to my X drive :-
So to have multiple copies of the game, but on another drive, I would move the base game to that other drive, and then have multiple copies of that folder with different folder names.
So I move the f12013 folder with Steam Mover to my x drive
x:\f12013 <---- Standard Game
Create multiple copies with a different folder name and with different content if I wish, because I am using different mods perhaps. So I end up with this on my X drive (example).
x:\f12013
x:\f12013 - Online mods
x:\f12013 - Offline mods
If I want to play the standard game, then I don't have to do anything. However if I wish to use my offline mods version. I simply rename the f12013 folder to f12013 - Standard, and rename the f12013 - Offline mods folder to f12013. So the 3 folders will now look like this :-
x:\f12013 <<------- this was the f12013 offline mods folder
x:\f12013 - Online mods
x:\f12013 - Standard
As long as you keep track of things, you can created a different driver profile for each folder. So whenever you switch folders, you also switch driver profiles.
f12013 ------->> Driver 1
f12013 - Online Mods ------>> Driver 2
f12013 - Offline Mods ------>> Driver 3
Hope this helps
Cheers