Since it's scentless, I'd aim towards the Kordes family. They make wonderful roses, but many are scentless.
Alexandra?
http://www.helpmefind.com/rose... (no ATP entry for the miniature)
Belami?
http://www.kordes-rosen.com/ko... (the ATP shows a completely different rose)
Solero?
http://www.kordes-rosen.com/ko...
Time of year, amount of heat/cool/water.. all those change the color of the rose I've found from my experience. But then again, I have really wild fluctuations of temperature, too.
