Wow, thanks for posting those! I want the aviator jacket and the fortune teller costumes for sure now! The jacket looks so cute on Duffy. I'm surprised how well the hats fit Duffy and Shellie, since BAB's are usually ill-fitting for them. I'm going to have to use my coupon on these too.
I've learned a few little tricks on how to get the hats from BAB to fit Duffy & Shellie a little better. For the baseball caps, I actually cut the ear holes a little to make them slightly bigger and the ears go through much better. Surprisingly on the scarf for the fortune teller costume, that wasn't needed, same with the aviator hat (probably because it was designed for Snoopy so his ears need to go through, plus Snoopy's ears flap when you press his paw.
I don't really think it looks that different than Disney's, but I'd have to see it in person when it comes out first. The main difference is just the coloring as Disney's is a darker jacket with light colored accents and pockets while Build a Bear's has it the other way around. The fur also looks done a bit differently, but only in some pictures.
The fortune teller outfit is probably my favorite out of the new Build a Bear costumes. I think it looks the nicest.