thats one extract type that i haven't yet been apart of the process , but i have grabbed some from my favorite dispensary in frisco and im positive it was a different solvent used then butane, from the look2the taste 100% different. it looked like red sand(never seen red sand in person but from what iv seen, just like it) and it just tasted alot cleaner and had much irritation on the throat and a pinch or2 on a few snaps would have you nice and toasted, a little pricey but definitely worth it2me...