There is none. iPod Touch 3G IS third generation.
The difference is that a 3rd generation iPod touch has voice control if you purchase the "Apple Earphones with Remote and Microphone". The 3rd generation is also faster and has a better processing system.
one generation
4th generation is more updated and advanced
There are certain games that you cant get on the ipod 1st generation also you you cant update ipod 1st gen with the new softwares but with the 3rd gen you can carry on updating it.
Not much. The only big difference is that the 3rd generation has a better processor, so runs around 50% faster. Also, the 3rd generation iPod Touch is available in a 64GB version, and is also cheaper.
well the 4th can take video the 3rd cant ooommm i just reccomend the 4th for everbody :)
The third generation introduces new hardware that is found in the iPhone 3GS. (increased RAM, better CPU & GPU.) The third generation also includes the voice control support from the 3GS which apple calls "VoiceOver".
A lot slowerBack is differentDoes not support some appsNot as sexy
third generation
that the 4g is a bit thinner, have built-in microphone and cameras
No, the third generation iPod Touch does not have an app to use a video camera.