What is the difference between Waves RBass and MaxxBass?

[Tafadzwa Twabam]

I know both are bass enhancement plug-ins but what's the underlying difference between Waves Audio Renaissance Bass and MaxxBass? And which one is better, particularly for audio mastering?

 

[Munyaradzi Mafaro]

Waves Audio Maxxbass is actually the opposite of Renaissance bass.

MaxxBass is designed to create audible harmonics above the fundamental, thus allowing for sub-frequency information to be a little more audible on smaller speakers and devices that cannot reproduce subfrequencies. In contrast, the RBass plug-in can extend the lower end of a fundamental frequency and harmonics downward.

 

[James Moore]

RBass adds a frequency like an octave under the target, MaxxBass creates harmonics above the target.