It is relative to the user but I mean in general. I am sure my alcoholic friends would all still be smoking pot if it gave them the kind of buzz they get off alcohol. You wouldn't agree that the euphoria from alcohol isn't a lot harder hitting and longer lasting than that from cannabis after the honey moon period from both has passed?
When I first tried weed, it was an amazing, incredibly euphoric ecstatic even and very psychedelic. Every bit, if not more euphoric than alcohol. After smoking for a couple of years, it was nowhere near as euphoric. Even if I take a long break, the first smoke after the break is usually pretty good for an hour or so and then already im coming down. Trying to keep the buzz going by smoking more just tends to make me feel lazy and burnt out.
Alcohol on the other hand, doesn't lose its magic nearly as easily but it is harsher to the body. I prefer cannabis but only because I love plants and herbs and I love the psychedelic introspective properties of cannabis. If I was going for numbness and euphoria and didn't mind the hangover, alcohol would beat cannabis hands down.