Let's say I have a GUI project "abc" that consists of 3 "components" each of
which has some widgets (GUI elements), model classes and controller classes.
What's the best way to structure the packages?

My first thought would be something like this:

abc.comp1.model.*
abc.comp1.view.*
abc.comp1.controller.*
abc.comp2.model.*
abc.comp2.view.*
abc.comp2.controller.*
abc.comp3.model.*
abc.comp3.view.*
abc.comp3.controller.*

but then I have seen others who structure things like:

abc.model.comp1.*
abc.model.comp2.*
abc.model.comp3.*
abc.view.comp1.*
abc.view.comp2.*
abc.view.comp3.*
abc.controller.comp1.*
abc.controller.comp2.*
abc.controller.comp3.*

Which is better and why?  Or perhaps there is a better alternative?