Up close you will tell them apart. However I feel most won't be able to when you're out in public and they smell it on you, walking by someone. It feels updated where they took something I didn't like about the standard L'Aventure and improved on it as that was a huge reason I never bothered buying my own bottle of L'Aventure was the sourness up close. Even if my brother didn't bathe in two 100ml bottles of the standard version over the past 5 years and it wasn't a new fragrance sort of excitement I'd still prefer intense.
longevity and projection felt about the same. To me it's like L'Aventure 2 or something. I would not buy this expecting double the performance of an already beast mode (to me anyways) fragrance.
Is it worth owning both? I'd say no