Well.. to be honest comparing Shrooms
/LSD with Salvia
is pretty rough..
means is.. Shrooms/LSD gives you at least mildly controlable trip, which lasts quite long - is generally organic and sometimes based on real life surroundings and feelings - in example, watching flowers, trees, water, etc.
While Salvia.. well - to be generally honest - when SWIY takes a hit:
a) in five seconds "the Force" from other reality comes out and drags SWIY back to it's extraterrestrial world;
b) "the Force" drags SWIY through the fabric of SWIYs world, other worlds, non existing worlds, SWIYs memories, SWIYs dreams, SWIYs wishes;
c) "the Force" gets SWIY back into SWIYs body, wondering what the hell just happened. Just sitting in awe and trying to understand where were you..
Just a general picture of what to expect. It's like watching 2001: A Space Oddyssey in 30 seconds, while Shrooms/LSD would make this a ten hour long movie. Though SWIM cannot compare the intensity of experience - even though Salvia's effects are time-like short, it is much more intense than LSD