A lot depends on what you use your iPhone for. I tend to view the iPhone as a better enterprise device. So, if you use the iPhone to connect to your corporate email server, I think this remains a better choice than the Samsung. Also, the iPhone works well with Google's cloud. The same cannot be said of the S3 when it comes to Apple's cloud. If you have a big investment in DRM protected iTunes music, transferring this to the S3 is not impossible (you'd have to burn it to CD first - that's the legal way
) but a PITA to do.