Look at the dock, the iPod's is brighter than the iPhone one. Plus there's glare on the iPhone screen, which the camera is obviously compensating for. Weather icon - the temperature is washed out on the iPod, because the icon is too bright. Do I need to go on?
Nobody is saying TN = IPS; I use both kinds of LCDs daily so I know the differences. The debate here is whether iPod = TN or iPod = IPS, and no conclusive evidence has been presented that the new iPod has a TN panel. Besides, even Apple says the iPod screen does 24-bit color, which means 8 bits of red, green, and blue, which is NOT TN because TN is 6 bits per component color (18 bit screens)..
PLUS! (I know most of you will don't trust Apple Experts, but...) I have spoken to 8 DIFFERENT Apple EXPERTS (yes 8!), and they ALL admit of the new iPod Touch 4G having an IPS Panel...
Again, they may be lying but, i've noticed that they do take at least 15mins to reply when i ask the question, and their reason for taking so long is because they need to contact the System Engineers.