Hi, I got some cacti growing in my garden. When I got them I've been told they are San Pedro, but I would like to confirm this is what it actually is. I hope the new "sprouts" aren't too small to identify. I cut off two ~50cm pieces a few month ago, because I wanted to try them (never tried mescaline so far). These are stored away powdered already, I just need to decide on an effective extraction tek.

In the second pic I attached, you can see a small cactus, which I have adopted only recently. This one looks similar to the others I already got.

I would be grateful for any input.

Edit: One has 6 and the other one has 7 spines, which I guess indicates it's not the same kind of cactus?