I already know that the CSS classes are the same. I figured that out. You misunderstood my questions.
Why can't I set the icon sizes separately, on the front editor? There is a setting for each icon, which technically allow users like myself, to set the size whichever desired. Why isn't it working?
I want to set the icons on the middle of the page larger and the icons on the bottom of the page smaller, but the current CSS class setting on the Custom CSS overrides any individual settings and make them all the same size!