2 CSS Classes for the Button

Hey there,

is there a way to have 2 diffrent classes for the Same button? We use this on 2 locations on our website and we need the button in 2 diffrent sizes. Example:
In the list view, the button should have the original size,
and on the details view the button shoudl be bigger.
I figured out the class

.simplefavorite-button.preset {

}

but when I change it has effect on both, and thats not the way I need it.
Any ideas? Mybe I′m just to blind to see the solution ;-=