For me personally I’ve never had a bad trip on any species of shrooms. Amanita, cubensis, etc. lots of visual melting and warm giggles. Also I feel gravitational pulls in different directions when shrooming, kinda like with salvia. With acid, I tend to get super anxious. Especially if I’m having it with THC. For visuals things tend to be more wavy and breathing vs melty. No gravitational pulls but I also feel less stoned. My mind tends to think way faster than it does while sober. Almost like it’s super-charged and I’m able to connect more dots with issues troubling me than I normally would be able to. As for similarities both substances give me an absurdly awesome body high that just feels like a warm hug, similar to MDMA but not as tingly. They also both have a very similar comedown for me. Mind racing, thought process at 150% and just reflecting back on my entire life.