I have yet to do 2C-P, but I found 2C-E to be very deep.
It was rather a sexual experience too, but altogether quite an emotional one - I think it would come second to LSD in showing me things about myself which I should consider changing - I found it to be more brutal and direct than LSD (it actually had me weeping at 12-14mg sniffed) in it's soul-searching qualities, which is why I would say it comes second as I found LSD to be easier.
LSD heavily "suggested" things as I started to come down, whereas with 2C-E I experienced the same sort of thing during my peak.
Am going to try 2C-P soon though, but I would suggest trying 2C-E - very worthwhile experience indeed.
Peace