chupucabras
Bluelighter
I had 8 grams, and they were certainly different (which I wasn't expecting, no placebo effect about them).
Well you might not have been expecting different effects, but you knew that what you were taking was different in some way to 'normal' mushrooms. This could have been enough to subconsciously influence the effects, maybe?
The visuals where quite mild but constant, and something very different to shrooms happened on them. I felt like my eyes were working seperatly, I had no depth percetption (I went to have a drink, and it hit my mouth when it looked like it was about a foot away, most other things looked like they were a lot closer), and could see a lot more (impossible to explain, but it's like I could see 180 degrees around me and more).
I've experienced the effects you describe on cubensis shrooms. But not every time I've had them. One of the many beauties of psilocybin, in my experience, is that it'll hit you with something slightly different or new every time. I think this probably plays a large part in the apparent differences in qualitative experience between different strains and species of mushroom.
If you had a LOT of experience with both truffles and cubensis then you might be in a better position to comment about objective differences, but I think the factors I described above are more likely.
It's also possible that relative differences in concentration of the active ingredients can alter the experience, but I get the strong impression from what I've read that this would only account for subtle differences. (Baeocystine/Nor-Baeocystine are not very potent, I don't think they'd affect you much if you took them on their own, but they are suspected to subtly alter the behaviour of Psilocyn and Psilocybin. I also believe Psilocyn breaks down very easily and possibly gets turned into Psilocybin anyway - or the other way round.)
I also read something on a vendor's site about truffles possibly having an additional active ingredient that fruit bodies don't, but I've never seen this claim elsewhere so it's probably wrong.
Dan