I have bottles of both perfumes thanks to my gifts to myself (my family gave me Gucci Sport...go figure!), and wore Une Rose yesterday. I was blown away by the longevity (given that this is my perennial problem), and also by how linear it is. I described it as being within a rosebud at dusk. I detected a lot of acetone, but then again, I detect a lot of acetone in real roses, so it was authentic.
I will open Sa Majeste tomorrow and compare.
Today I'm opting for C&S Dark Roses.
I tried Portrait of a Lady at Aedes when I was in NY over the holidays and found it to be more complex than Une Rose, if that makes any sense.
Thanks for your feedback. When I'm in Dubai next month, I'll have to pick up Diptyque's new Eau Rose which, according to what I read on other post, seems to be just up my alley.