LSD lasts about 8-10 hrs and shrooms will last for about 4 hours. Shrooms make you feel more connected with nature and stuff, and LSD does too just not as much. LSD is more intense with more visuals, and shrooms do make you hallucinate but not as much as LSD. But, you can take enough shrooms for it to be more intense than an LSD trip.

As long as you are prepared with your surroundings, mood, music, sitter, all that stuff and you think you are ready for acid then you should be fine. Have fun and dont take it if you are in a bad mood.