Components vs Entity

Hello

What are the Pro's and Con's of Unity3d Component programming vs the more traditional Entity programming ?

 

I can't say I ever heard the term Entity programming before, but I'm guessing that you are referring to using class inheritance to compose your game entities.

If I guessed that correctly, there is an abundance of information on the inheritance vs composition topic available:
http://cowboyprogramming.com/2007/01/05/evolve-your-heirachy/
http://www.eflorenzano.com/blog/post/inheritance-vs-composition/

Google will give you about 2 million more if you search for 'composition inheritance'