Hierarchal MVC - Which One?

[eluser]KarlBallard[/eluser]
I'm not new to the whole MVC approach, however I am to the Hierarchal MVC approach. I know the rest of the post may seem vague, but I'll try to describe it the best I can. I see on this forum people talking about Hierarchal MVC and the two systems that have been developed for CodeIgniter. My question for is:

Which one is better to use for someone used to CodeIgniter, but has never tried an HMVC approach?

The reasons why I believe I need a Hierarchal MVC is because I am currently developing a text-based RPG which needs modules for plugins, but also for an admin panel that will be sharing alot in common with the internal public side of the site.