Yeah.. Totally depends on how potent the shrooms are and what strain. Also depends on the potency of the LSD. It can vary a lot.
I've ate 8th of shrooms that barely made me trip, and I've ate 8th's that melted my whole reality. I say start low to be safe, until you know how strong they are.
And they're both tryptamines, so the feel is similar, but the more I've used them the more I can tell the differences.. I have friends who prefer shrooms, personally though I prefer LSD. It's just a personal opinion though.
You'll have visuals/mindfuck with both though, at the right dose. Chemically, mushrooms are very similar to N,N-DMT.. And I think the feel is definitely similar too, but nowhere near as intense.