Payola vs Plugola - What's the difference?

payola | plugola |

As nouns the difference between payola and plugola

is that payola is (us) a bribe given in exchange for a favor, such as one given in exchange for the promotion of goods or services (originally one given to a disk jockey to play a record) while plugola is (chiefly|us) undeclared or illicit publicity or product promotion, especially on radio or television.