They've been the same since the iPhone 3G/3Gs.
i noticed on the iphone 4s earbud that they added a small rubber reinforcment i guess below the part where the mic starts. so whats with that?
umm, they decided that area needed reinforcement. does it really matter?
i want to know if its a better headphone, thats all.
Sound quality from these iPhone headphones have been the same for me since the iPod mini...which I consider decent.
http://www.head-fi.org/ has great reviews by users.
The Apple ear buds are a embarrassment to Apple engineering.......