SAN PEDRO CACTUS ID

[tambaelok]

hey i was walking down the street and noticed a massive cactus that may looks similar to a San Pedro cactus...can anybody out there help me identify exactly what kind of cactus this is.
thanks in advance

 

[Ez]

You can't be Cereus! Sorry, it's not a Tricho.

 

[tambaelok]

haha sorry im not an expert are the san pedro cactus smaller than that?

 

[tambaelok]

my friend also gave me a cutting of a cactus he found in the streets and he seems certain this one is definetly a san pedro cactus

 

[dg]

the cutting looks good.
as EZ said, first pic is a cereus peruvianus, non active