Standard when changing map discs

Here's how to check for changes:

1. New Streets
Drive to an area that was not mapped on the old NavTeq disc (tip: don't use the nav to get you there because the street won't exist on the nav)

And see if it is mapped on the new TeleAtlas disc

Tip: due to the size of the USA, I you may need a few tankfuls of gas and a few years of your time to verify the entire country :-)

2. Changes in Street Names
Look up a street where you know the street name was wrong and compare between discs

3. Changes in POIs
Look up a POI that you know was missing on the NavTeq disc and see if it exists on the TeleAtlas disc

I think if you're read this far you'll understand how dificult it can be to compare maps, without any way of checking the disc data content

Eg: if you live in New York City, how would you ever notice how many roads change in Texas, or Seattle, etc?

HOWEVER you can check POIs.
Compare POI file sizes.
When you see a difference, use my POI Extractor to extract all POIs from each disc to excel sheets. Then compare lists and see which map has the most POIs.
Whether the POIs are correct or not you can only determine by either contacting each POI or comparing with some other source. Although how would you know the other source is correct?
Look up POIs and compare