Is the Iphone 4 much faster/better than the Iphone 3GS?

I know Iphone 5 or Iphone 4S would be the best option but I'm on a tight budget… so I was just wondering if the Iphone 4 is worth the extra money, or if the 3GS is just as good?

См. статью: Is the Iphone 4 much faster/better than the Iphone 3GS?