There are very few perfumes which are truly original, and most of them were created long ago. Given all the IFRA restrictions on aromachemicals, the perfumer's palette is limited and new scents DO tend to resemble existing ones. The new Guerlain Idylle could easily be mistaken for Narciso Rodrigues for Her, or Sarah Jessica Parker's Lovely. A Scent by Kenzo, recently released, isn't a mile away from the dry green Chanels like Cristalle and No. 19. I doubt very much if Liz Earle's nose (perfume designer) was trying to make a dupe of Diorella; it's more likely that the aim was to create something green and unsweet, which is a family of scents.