I got my first 'included' Earpods with the new iPod Nano yesterday. No Apple controls, lighter bass, more treble. Not a huge difference, perhaps 2 db difference on each end. I don't know if this is going to hold up consistently in production, but since the first Earpods were already treble-happy, more treble is not good.
Side note: One review site was reporting that the new iPhone 5 had significantly less volume output than the iPhone 4, and while I can't verify that, the new iPod Nano has every bit as much volume, dynamic range, and sound quality as the year-old or so iPod Touch.