Please Explain Comment Systems and Benefits

Hello,

Would a support mod please explain some of the key benefits of the Easyblog, Easydiscuss and Kommento comment systems and various plugins

I have purchased and installed Easyblog, Easydiscuss as well as Jomsocial and installed Kommento.

I wish to integrate these components with Jomsocial but am unsure of the best comment system to use.

Thanks