Mobile site question....parallel controllers, or just add mobile views?

[eluser]groggster[/eluser]
I am trying to add mobile support (android/ios/bb/winphone) etc. to my site, however I am having trouble making the decision of whether to just use the same controllers, and just add mobile views or to create "mobile controllers" as well(sort of a parallel web applications within CI).

I consider myself an intermediate at CI, and although my code is pretty decent, I always have problems with these type of "structural" decisions.


Anyone have any experience that can help me here?