mescaline feels like LSD without the push or pull, the trip itself feels quite amazing you get the body high and nice visuals without them being "overly" intense, also it doesnt quite present the "mind fucks" that LSD has which tends to make your mind race with thoughts and questions you cannot answer before they fly away.
LSD v.s. Mescaline in strength i would say LSD is sometimes "harder" to handle but that depends on your experiences and chemical makeup
That also depends on how much you take if you extract it or eat it whole, that depends on you.
I've eaten san pedro before, honestly it takes like rotting puke but to each his own.
Enjoy!