I think these are roses where budded vs. own-root makes an enormous difference. I saw Tuscany Superb once at the Roseraie at Bayfields. They imported their once-bloomers from Canada, and they tended to be budded. That one certainly was, and it made a very mannerly shrub that was about 4 x 3. A few years later, I had a chance to get an own-root Tuscany. Its growth habit is that it doesn't have a growth habit. There is a cane, three inches over there is another cane, and a third cane is about two feet away from those. It isn't a shrub in any definable sense of the word. Right now it has a fair amount of competition because it wandered into a patch of chrysanthemums, a baptisia, and a peony. Not to mention multiple patches of daylilies.
I think it was Brent Dickerson who opined that these are species selections.
Q