I suggest that you steer clear of anything you cannot positively ID as Williamsii with absolute certainty. I read somewhere that decipiends have a similar content to diffusa. That experience report in Erowid regarding the diffusa is very accurate. If you chose the wrong lophs you end up in a state close to delirium, with disgusting auditory effects where you hear everything toned down a few octaves and your eardrums feel like they will implode. I don't see any value in diffusa as a psychedelic and consider it to be on par with datura and the likes as far as its appeal is concerned. I even took brugmansia with no issues but it was after 5 medium to large size, shady looking lophs that I ended up with permanent hearing issues . Will never welcome any loph in my garden or body ever for sure.
The fool who picked this pen will always be wiser than the fool who dropped it.
-Excrept from Chasing Shadows