Here is a comprehsive comparison of features and price that you would pay for an Apple iPhone 3GS as against Motorola Droid (Pricing for the US market)
Carrier
iPhone 3GS : AT&T
Droid : Verizon
Storage Capacity
iPhone 3GS : 16GB
Droid : 16GB (expandable to 32GB)
Battery Life
iPhone 3GS : 5 hours talktime. 300 hours standby
Droid : 6.4 hours talktime. 270 hours standby
Camera
iPhone 3GS : 3MP with Video recording and editing
Droid : 5MP with Video recording
Video Formats
iPhone 3GS : MPEG4, H.264,MOV, M4V, MP4
Droid : MPEG4, H.263, H.264
Audio Formats
iPhone 3GS : MP3, AAC, AIFF, WAV, Audible (2,3,4) Protected AAC, VBR and Apple Lossless audio
Droid : MP3, AAC, AAC+, eAAC+, WMA, AMR WB/NB, WAV, MIDI
App Store
iPhone 3GS : iTunes App Store
Droid : Android Market
Number of Apps
iPhone 3GS : 100,000
Droid : 13,000
Multitasking
iPhone 3GS : No
Droid : Yes
Price
iPhone 3GS : $199 or $599 (without contract)
Droid : $199 or $599 (without contract)
Wifi : Enabled on both
GPS : Turn-by-turn and digital compass available on both
Voice Commands : Available on both
Unlimited Usage Plans Cost (@ unlimited voice, messaging and 5GB data)
iPhone 3GS : $3,799 plus tax over 2 years
Droid : $3,799 plus tax over 2 years
Average Usage Plans Cost (@ 900 minutes, 5GB data, Unlimited messaging)
iPhone 3GS : $2,839 plus tax over 2 years
Droid : $2,839 plus tax over 2 years