its fucking different. k is a dissassociative anesthetic so you cant really say that u are hallucinating even when u are on a shitload of k. you may see cool visuals but its still not classified as being "hallucinating." in my opinion, salvia and being in a k hole is different, but hard to explain why. u can relate to salvia with substances such as 5 meo dmt, dmt, etc. where when u hallucinate, you will see things and make u believe that the transformation is really happening and what u are experiencing is a reality. your perception of reality is unclear, and u are hallucinating ur balls off. like u start becoming other objects and to describe ur salvia trip u can only say shit like "I was a brownie, and i tasted myself, and i tasted like chocolate. and i saw a little girl walking into the hole that made me feel like a chocolate candy bar." what im trying to say is. its a weird experience definitely worth trying out. and if ur gonna put time, effort and money into trying it, do it right. it's not like smoking weed, there are some things that u have to do to get the full effect.