Q: Apple Watch Nike+

Good Evening,

Hi I was just wondering if anyone can let me know if there are any differences between the Apple Watch Nike+ and the Apple Watch series 2. I am a little confused because i am not sure if the nike watch is the same as the series 2. If anyone can let me know the difference between them if there even is any, I am very curious due to the fact that I am looking to pre order one of them.

Thanks.