Samsung u900

Hey mate  

Not worth it IMO,both phones have actually same specs,the main difference is that U900 has a touchpad too,the display size,scree resolution are the same and both phones have 5MP camera.

Here are 2 reviews,check them and they will help u :

Samsung U900 review:
http://www.gsmarena.com/samsung_u900_soul-review-229.ph...

Samsung G600 review:
http://www.gsmarena.com/samsung_g600-review-187.php

well if u actually read the review and comments the u900 is better than the g600!!!!!

I didnt say its not better mate  
I said the difference isnt much   and its not worth the upgrade