Hi,
I'm on Windows, but i aasume you also can uninstall the applications one by one on a MAC (just like you would uninstall any other application), and then just don't uninstall those you wan't to keep. I would beleive that would work.
Not sure i understand what you mean with "best way" to remove.
Keep in mind there are differrences between VC4 and VC5 applications. Also in sound and in availble presets. So perhaps you wan't to keep both. They don't take that much disk space.