His love is as charming as any of those who are praised by false comparisons.
Throughout the beginning of Sonnet 130, the speaker uses various images that show his beloved is not as perfect and beautiful as other poet's make their beloved's out to be. Instead of elaborating and exaggerating on his beloved's features, the speaker says the object of his love has hair like wires and stinky breath. However, at the end of the sonnet, the speaker says that he loves his beloved just as much as any of those others who would make elaborate comparisons to theirs.
The word would be extrinsic. Extrinsic means "<span>not part of the essential nature of someone or something; coming or operating from outside."</span>