I am actually way more nervous about 2C-E than 2C-P. I don't find 2C-E very mescaline-like at all, personally. Mescaline, to me, even at 550mg orally of pure mescaline, was gentle and loving and comfortable, I felt very much in the driver's seat. every time I've taken mescaline (every other time has been cactus), I feel a boundless love, almost MDMA-like. I haven't found it very visual, and it feels really great in my body and mind.
In contrast, 2C-E feels emotionally neutral, godlike almost, It has a heavy bodyload and is a difficult experience, very rewarding though. I have had at least period of heavy anxiety and difficulty on every 2C-E trip I've had. It's also extremely visual for me.
I also had one of my few +4 experiences on 2C-E. I watched what I can only describe as the 5th dimension spread out before and behind me, wider as the moments progressed forward and backward. If the 4th dimension is time, and its plane is the entire spacetime continuum from beginning to end, it is just an infinitely thin slice of the 5th dimension, probability, a different arrangement of how things could have gone in the history of spacetime. I could see alternate paths branching out... I step forward, I step left, I step right, I don't move. I saw that spread behind me... I could have not been here, I could have been over there, I could stayed upstairs, I could have not taken 2C-E. It was overwhelming. I also had a thought loop that was slowly dismantling all of my rationalizations as to why I existed and this wasn't an illusion, and the peak was, I woke up from the dream, and I was a single, dimensionless point in an abyss, infinitely lonely. I struggled back and wanted my/our dream to continue. I felt I had doomed all of existence to end, even if it wasn't real, it was a lovely dream. No matter how horrible it can be, it was better than empty nothingness with no one and nothing. I considered cutting my wrists or throat with a kitchen knife that was nearby, to save us all, but thought no, you very well might just be tripping the most balls you've ever tripped, ride it out.
It was terrifying and incredible, and altered my conception of things.
Every other 2C-E trip I've had was not like that, though. Although extremely intense, still. I consider 2C-E the most intensely psychedelic compound I've done (though I still have a few to check off my list, like 5-MeO-DMT and DPT)