the caps technically have a higher alkaloid content than the stipes, but the difference is negligable and not really worth thinking about. the stipes still have perfectly usable levels
From what I've read, caps have about .1% (on average) more psilocybin than stems. I don't remember the figures on psilocin, but it wasn't much difference. You'll trip just as hard from an eighth of caps as you will an eighth of stems.
