Yes they certainly do have a wide range of colors, flower forms, and heights. I have small Profusion series, mediums, and very tall. Quite fun to watch them all grow.
I wonder if saving mature seeds would result in the same flower next year. A few varieties cost more, so I might harvest seeds and give them a try next year. Zowie Flame and Uproar Rose are 2 like that.
For sure, harvest seeds this year & give them a try next year. :-)