Speaking ONLY for myself, here's how I remember it:
The hybrid teas are the ones that are mostly dead in the spring.
The floribundas are the ones that have too many green canes for me to prune.
Grandifloras have one big tall thick stick in the spring. Might or might not be green.
Shrub roses are the ones I don't prune, that I can plant anywhere in the yard, that hardly ever spring a Dr. Huey shoot, and stay clean of disease without any action on my part.