Hard as I try, I cannot imagine any circumstances in which Rickie Lambert would bite another player.
As for the BWP case, yeh, he got a few joke chants from the crowd, but was roundly condemned by the overwhelming majority of saints fans, not least on here. And he was sold as soon as it became practical to do so, while Suarez has already been told that Liverpool want to retain him for the duration of his contract regardless of the assault. If you cant see any difference between the two cases there's really no point debating it.