Hi, this is a simple comparison.  
I took me a while but I realized the similarity with these characters. After seeing the game of “the Wolf Among us” and read the comic “Fables” and seen EG Rainbow Rock (and the comic Equestria Girl Holiday 2014, you know “Anon a miss”).
 
example:  
-they were the bad guys in the past.  
-They were reformed with the help of a Princess. (I’m not sure about Bigby, but Snow White gave him a chance to be the sheriff, or at least gave their support).  
-none of them is human (Bigby = a Wolf and Sunset = a Pony).  
-They come from magical lands.  
-They try to correcting their errors.  
-They became friends of their “victims”.
 
 
Seriously, they are similar!!