Nikon lens comparison...help me understand the differences

[thouts]

So I would like a zoom lens. I know there must be a big difference between these lenses or the price gap wouldn't be over 400 dollars. I realize you get the 18-55 zoom level with the more expensive lens but what are the other perks?

Thanks.

http://www.amazon.com/Nikon-55-200m...2?ie=UTF8&s=electronics&qid=1229029954&sr=8-2

http://www.amazon.com/Nikon-18-200m...3?ie=UTF8&s=electronics&qid=1229029954&sr=8-3

 

[compuwar]

So I would like a zoom lens. I know there must be a big difference between these lenses or the price gap wouldn't be over 400 dollars. I realize you get the 18-55 zoom level with the more expensive lens but what are the other perks?

http://www.bythom.com/55200lens.htm
http://www.bythom.com/18200lens.htm