Hi there, notmenoeb!
It sounds like you prefer floral-orientals - except for Mitsouko, which is a chypre, everything you list has a strong floral component and an oriental base, and Allure has loads of vanilla. La Perla is also a chypre, so it's much more mossy, dry and green compared to the others you mention. It's absolutely gorgeous - it's one of my very favorites - but it doesn't share many similarities with Allure, LouLou or Boucheron.
I'd recommend you try other florientals and vanillas, maybe something gourmandy like Dior's Hypnotic Poison, or Addict. Lolita Lempicka and L de Lolita Lempicka are others you might look into. My personal favorite floriental is L'Instant de Guerlain, but it can be polarizing so samples are really the best way to go. Oh, I've always found 24 Faubourg by Hermès quite similar to Organza and Boucheron. Thierry Mugler's Angel and Alien are very good - have you tried them? Coco Mademoiselle is a fruity floral, so you might also like Calvin Klein's Euphoria or Badgley Mischka. Now Absolu (I love this one, too!) is more woody and soft...they're not exactly alike, but Roberto Cavalli's Oro has that same warm, woody coziness. And try Love, Chloe and Prada Candy while you're at it - they're a bit new and worth a sniff if you like them soft, sweet and nuzzly.
There are lots more of course, but that's a start. Good luck, and welcome to basenotes!