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: 3b, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
Oils and my own procuts are my hairs best friend
my hair goal length is bra strap length when curly.