CodeIgniter or PhalconPHP ?

I am still don't know which one I should go for next project. Codeigniter or Phalconphp. The project is about price comparision.
Phalcon and codeigniter are 2 fastest phpframework at the moment (I got it from http://www.sitepoint.com/phalconphp-yet-...framework/). Phalcon is 3 times faster than codelgniter.

- The question is what is the different between these two ?

The problem is a alot of coder using codeigniter today while phalcon still very unpopular. In the real time, will the have significant different ?

Can I use strong hardward to replace for software (here is codeigniter) ?

Thanks