Apple USB adapter VS world travel adapter kit!

Firstly, i'm posting this here becausa i didn't find a better place.

Well, I need a wall plug for recharging my ipod and since the price difference between these 2 products is only $10 I started to think which one is the best.

I mean..obviusly the travel kit comes with the charger and many more stuff, and the usb adapter comes all by itself. Does that mean the usb adapter is better in some way?

Could you guys give me hints for choosing between them?

Thanks!