you can be both a medium and psychic, I can both see things others cannot, and I also communicate with spirits, animals and yes even plants. everything you see has a living energy in it. some use cards, some rocks, some can use everything.,
and when I say I can see what others cant I dont mean a form behind you, it comes as a thought, or just plain out knowledge. everyone has a spirit guide or 2, I have many.
also the depth of the gift each person pocesses also plays into how much they can see or do. you can be an incredibly powerfully gifted medium/psychic, and never have a clue, it has to be tapped into and utilized. but if you are a Medium, the spirits only allow you to block them for so long.