Yeah, Ashlee basically confirmed she had a nose job with, "Maybe. Who knows? *giggles*" Because you can tell there's a difference.
I still like Ashlee better than Jessica. If you've heard Autobiography (her first album), Ashlee's raspy voice actually works with those songs and they're catchy. Jessica's latest album is just wailing (don't even get me started on how she just butchered Robbie Williams' Angels song). Jessica has a great voice but the material they're giving her is just awful and she oversings it.
The only reason why I don't like Jessica is because she's so overexposed. Jessica is a celebrity because of her appearances in the tabloids, her reality TV show, being blonde and stupid... sound like anyone we know? *coughParisHilton!*cough* You can't go anywhere with seeing her on the cover of a magazine.
Ashlee got a lot of publicity because of the SNL lip syncing, but at least she isn't EVERYWHERE, with a clothing line, cosmetics line, etc. And she doesn't play up the image of a "dumb blonde" like her sister. Plus, she didn't basically throw away her relationship (or in Jess's case, her marriage) for fame.