We're still talking about Ardent, right? I definitely see it that way too: softer-warmer-more feminine in Petra's rose garden, and also, as I remember, more subdued. But also less ardent than Ardent.
I just sprayed it on my right wrist, and it reminds me of Rose de Petra. So, on my left wrist, voilà, striking similarity! The RdP is a bit softer and warmer, maybe a little more feminine, and I actually like it just a tiny bit better at the moment.