Hi, I've experienced 'Crescendo' and 'Soft Whisper' at our local rose show this year. While they share the same parentage and date of introduction, there are quite a few differences. Crescendo has a darker edge blush and Soft Whisper is a taller, more high centered bud / bloom with lighter edges. Also, Soft Whisper is more fragrant. Definitely different cultivars. J&P is offering both in the catalog this year.
