Shelter Casement Window weather stripping replacement
I'm not even sure what your stock weatherstripping is, to be honest. Before I can make any recommendations, I'd need you to remove a sample of your current weatherstripping and showing us a photo of it from the end profile. That will allow me to ID what you have.
That said, I can tell you right now that there usually isn't "better" quality weatherstripping for any single type. Manufacturers pretty much just make these one way. As for foam vs hollow bubble, they both perform their job equally well. Neither is superior than the other.
I'm more than happy to help you ID a match for your current weatherstripping, but I feel obligated to tell you now that you probably won't find anything that's considered better quality. You'll probably have to stick with what you have now.