What is the difference between google nexus and iPhone4?

I have used both of these models and currently I have downgraded my standard as I have been using Samsung Galaxy tab. But the experience with both of these phones were great and one honest thing about both of these phones is that both provides cutting edge technology but at the same time differ a little bit from each other. First difference is between their operating, Nexux operate Android operating system and iPhone works on IOS. Both of the OS are really famous but I liked IOS than Android. Google provides 1 GHZ hummingbird processor and space of 32 GB and iPhone will give you A4 processer with 16 GB of memory. In iPhone, you will also be able to make VoIP and Sip calls and in Nexus too, you will be able to place the VoIP call directly from the contacts. One feature where, Nexus goes ahead is its noise cancellation software, which tremendously improves the call quality. I liked the design of Nexus as it has got sleak design which is slightly sleakier than iPhone 4 and also lighter than the same. Music quality of both of these phones is approximately same but the prices are one factor which makes Nexus the favorite choice among both the models. Nexus is priced at $199 and iPhone is priced at $529. I am sure I have told you about everything related to both of the phone and you can make right kind of choice for yourself.