The Verizon and AT&T versions of the iPhone 4 will be technically the same but they will feature a few changes in terms of both design and internal structure. Some of these design changes or modifications could include changes to the antenna to help address the infamous “death grip” and a Verizon type CDMA chip to be used instead of GSM, which is common to AT&T.

However, even after taking these changes into account, the phones will cost approximately the same at around $200 – $300, depending on the version of the iPhone 4 (16GB or 32 GB). Yet, it seems that Verizon is set to sell the iPhone at $50 more in comparison to AT&T. Thus, a 16 GB iPhone 4 will cost you $599 at AT&T but it will cost you $ 649 at Verizon. Meanwhile, a 32GB iPhone 4 will cost you $699 at AT&T and $749 at Verizon.

The difference in the iPhone pricing can either be because of the CDMA chip modification or because Verizon is in a powerful position to charge more. Some experts claim that the company may be able to add more than 9 million subscribers to its network through the iPhone 4, with almost 6 million potential defectors from the AT&T network.

Verizon is set to add further credit incentives to get lure more subscribers from archrival AT&T and get more of its customers on board. However, it must be noted that Verizon already has a powerful line up of alternative smart phones, including the increasingly popular HTC smartphones. Apple may have expanded its market, but it is also set for a lot more competition.