The comparison chart below compares the iPhone 4 to the nine Windows Phone 7 launch devices:
iPhone 4 with iOS Win7 Mobile Smartphones Processor: Apple A4 Chip (1GHz) 1GHz and up RAM: 512MB 512MB
Internal Storage: 16GB or 32GB 8GB-16GB
Camera & Video: 5MP with 720p recording 5MP-8MP with 720p recording
Screen: 960×640 Retina display WVGA-480×800 super AMOLED
Battery Life: 7hrs talk-time 300hrs standby
Up to 7hrs talk-time
Up to 456hrs standby
Video Calling: ✔ ✔
GPS: ✔ ✔
Physical Keyboard: ✖ Available on selected devices
Accelerometer: ✔ ✔
Gyroscope: ✔ ✖
via cultofmac.com
The only significance here is if the two _weren’t_ roughly equivalent. Any phone that expects to compete in the iPhone/Android space has to have the basic list of checkboxes covered, or it’s a non-starter