I have had both when I had a garden in pa. I'm not sure if it was my climate , but Sally's flowers turned a yucky muddy color very quick . I love darlow for its resistance to disease and fragrance and constant bloom. So thorny tho you really couldn't move it tho even if you had to! I have another one coming and I can't wait to smell it again.
I can definitely see fresh blooms on Sally being great in a bouquet tho !