Because I can't use an iPhone on Verizon. And I don't want to stop using Verizon. I am on my moms contract so it is only $10 a month instead of having my own plan. But I would love to have an iPhone instead of a Blackberry for sure.
Neither have wifi capabilities. However, the storm has 3G which I would choose. If you wanted an iphone, the storm would be your best option for a few reasons.