Question about pictures/person folders in steam workshop folder

Hi. After several hard drive failures, I've finally got around to reinstalling FM14. Unfortunately, I've forgotten a lot of stuff that I used to know about directory structure etc. Also, this Steam Workshop is kinda new to me.

I've installed one of the faces megapacks, and I've created a few of my own that are not in the megapack.

When I was copying across from another drive, I noticed there was a Steam Workshop folder. Out of curiousity, I had a look in it. This is the location:

\Users\User\Documents\Sports Interactive\Football Manager 2014\steam_workshop\graphics\pictures\person

There's roughly 3.5GB of players' faces (and managers, physios etc). I also have the faces magepack, as I said, installed to:

C:\Users\User\Documents\Sports Interactive\Football Manager 2014\graphics\faces

I noticed that the images 0 and 1394691683 are identical in both the Steam Workshop folders and the megapack folder.

My megapack folder has over 211,000 files in it, and the Steam Workshop folder has nearly 71,000 folders (each with an individual config and png file).

My question is should I delete the Steam Workshop folders?

Thanks in advance.