mmm idk what the differece is either but i always go for infused, i make my own, by making like a tea of it, pouring water over the herbs and just letting it to sit for awhile. i dont make FSG but i have done marshmallow root, and last batch i did do it with infused herbs. worked out really really well

my hair: 3c, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
my hair goal length is bra strap length when curly.

I also blog about my hair journey, please feel free to read and comment/ask questions