A:AnswerWithout wifi,your Ipod won't play purchased songs from iTunes unless you add it to your Ipod,while connected to your computer directly or using bluetooth from your computer. Otherwise your purchased music will be grayed out and not playable.
A:AnswerNot entirely sure. Possibly just size storage. My previous iPod was a Shuffle which is a very old model. I wanted a bluetooth wireless capability with a lot of storage space so I got this one..it is a very nice unit and is working great for what I needed it for.