The problem with words is that they have different meanings to different people, and sometimes we get to tied up in the minutia. I think all gardeners are people who like to grow plants. That can be plants of many kinds or multiples of one. Probably it's a waste of time to worry about which is better then the other, or that there is a major difference in their abilities as a gardener. (IMHO) We as humans sometimes get caught up in the evaluation of others. We seem to need to have things quantified, graded, and organized for some reason. I have times when I think I am a good gardener, and other times I would be embarrassed to have someone see my gardens. But the important issue is that I garden for ME! If I am happy with it, that's all that matters. If I'm not happy with it, then I need to do something about it.