Verizon iPhone 4 Teardown reveal the differences between CDMA and GSM iPhone 4. Interesting details are:
• Verizon iPhone comes with a Qualcomm “Gobi” MDM6600 wireless chip supporting both GSM and CDMA. The Qualcomm MDM6600 chip supports HSPA+ data rates of up to 14.4 Mbps as well as CDMA2000 1xEV-DO Rev. A/Rev. B.
• The location and design of the RF components such as EMI shields, connector locations including board layout has been changed comparing to the GSM iPhone 4.
• Apple has redesigned the vibrator and has moved it to the bottom left corner instead of top right section of the phone.