What I had for potency, which was consistent with what I was told they should be, was 10ish grams is close to 2-3 grams of the average shroom. I the one night I tried them I was with 3 others. We all had planned to eat 20 grams, with me having 30 as I had got them. 1 person only ate about 5g though, the rest of us had about 10. We all gave up because they were the most putrid, vile things any of us had ever tasted. They smelled really strong which definitely didn't help. I never got to where I wanted to go though, so about 3 hours later I managed to put down about 20ish grams (basically as if they were pills, I pre-crushed 'em and just gulped and drank a sip of water and repeated). I then proceeded to have a spectacular and powerful trip. After the peak though I was glued to the toilet for about an hour with nasty diarrhea. I would say just get shrooms. They don't taste great either but the truffles aren't worth it. And the effects aren't different. At least it wasn't different any more than any individual experience is different than your other experiences. Psychedelics tend to vary a lot from experience to experience. Of course, I might have just got some old, sour ones or something. If truffles can even go bad.