Ive had this question asked of me many times, and honestly though these substances can be similar, I view them as totally different experiences. Every time I introduce someone to a new Hallucinogen, be it LSD, Mushrooms, DMT, or Mescaline, people want to know, well what is it like compared to another? I think It's pretty much impossible to really accurately compare them, Ive also noticed as time and experience goes on ,my experiences evolve with individual compounds, for instance, my trips today are very very different from my trips when I began to journey. I find any of them to be predictable only to a certain degree, and the rest is up in the air. The unpredictability is actually quite exciting.
Toadfreak!
Travel like a king
Listen to the inner voice
A higher wisdom is at work for you
Conquering the stumbling blocks come easier
When the conqueror is in tune with the infinite
Every ending is a new beginning
Life is an endless unfoldment
Change your mind, and you change your relation to time
Free your mind and the rest will follow