Bone went 4x Plat with E.1999. Wu Forever was also certified 4x Plat, but since its a double album, that means only 2 million copies were sold. So I I don't think it's an exaggeration to say that Bone was far more commercially successful.
I'm not a Bone fan, but it seems to me that the general consensus regarding Bone is that, at most, they have one classic album, E.1999. Although I think it's a disputed classic, for the sake of argument, I'll concede that.
36, OBFCL, Liquid Swords and Supreme Clientele are undisputed classic records. 36 and OBFCL would rank in the top ten or twenty for most.
That is the factual basis for the opinion that they are far better and make classics.