Ah yes, "Alien Limited Edition" has been matured the same way that fine rum is aged, in old oakwood casks. ... And , yep! I too think the "large diamond in a gold claw setting" bottle is a very striking design ! Quite stunning !!
And "Angel Limited Edition" and "Angel La Part des Anges Limited Edition Extrait" (for this one, only 4742 Swarovski encrusted bottles released) have both been aged, like fine cognac for between 12 and 23 weeks, in old cherrywood casks (as mentioned before above).
Apparently this aging process has been overseen by a true French cellar master, an expert in the aging of cognac : Pierrette Triche of Rémy Martin. The result being a more concentrated, rounder version of Angel, with accents of candied fruits and amber. (I imagine a similar result for the "Alien" one, except more "oakoody" in nature, of course !
I think all three sound absolutely amazing ! And I can't wait to get my snozz near them !