New Guy with a question

Hey all- I just wanted a quick opinion. I currently have a iphone 4 and am looking to go to the 4s. My home button is starting to die. I can either buy a cheaper 4 or upgrade for some more money to get a 4S. Does it have any better GPS capability? Is it worth it? I am pretty content with the 4.
Thanks all

As far as I know, the GPS in all the iPhone models is equivalent (not improved by the 4S).

I would assume it’s the same. That said the accuracy of the iphone 4 and 4s is good. Same goes for the recently released iphone 5.

I have used several different iPhone and i think GPS is near about same in every iPhone so for this purpose you no need to change your iPhone.