diff b/w webdynpro and visual composer

Hi all,

I am new into Visual composer

1. what is the difference between webdynpro and visual composer?

2.what r all the feartures, advantages, disadvantages  included in webdynpro and visual composer?

3.why to choose webdynpro?

4.why to choose visual composer?

           Please help

Regards,

P.Manivannana.